Liquid leakage determination device, liquid leakage monitoring system, liquid leakage determination method, and liquid leakage determination program

Abstract

To provide a liquid leakage determination device that enables a simple and reliable determination of occurrence of a liquid leakage in a seal part a pump device has, without being affected by an environment where the pump device is installed.SOLUTION: A liquid leakage determination device 40 comprise: a detection data acquisition unit 41 that acquires liquid leakage detection data a liquid leakage sensor 30 attached to a pump device 3 detects; a meteorological data acquisition unit 42 that acquires meteorological data in a pump device installation position where the pump device is installed; and a determination unit 43 that determines presence or absence of occurrence of a liquid leakage, and a possibility of wrong detection of the liquid leakage on the basis of the liquid leakage detection data and meteorological data.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a liquid leakage determination device, a liquid leakage monitoring system, a liquid leakage determination method, and a liquid leakage determination program. [Background technology]

[0002] In buildings such as ordinary buildings and apartments, a cabinet-type water supply device is installed indoors or outdoors, and tap water pressurized to a predetermined pressure is supplied to each household. A vertical pump is used in this type of water supply device, and for example, a booster pump having a motor section and a pump section is generally used. Inside this booster pump, for example, a mechanical seal is housed as a seal section for sealing the main shaft and preventing leakage from the pump section to the motor section. This mechanical seal may leak water due to deterioration over time, and therefore it is widely practiced to replace the mechanical seal during maintenance.

[0003] Conventionally, a leakage sensor has been installed near the seal of the pump used in such a water supply device to detect the water leakage state of the mechanical seal by the presence or absence of water droplets. However, when detecting the presence or absence of water leakage with a water detection sensor installed near the seal, erroneous detection may occur due to condensation or rain in outdoor pumps.

[0004] For example, Patent Document 1 discloses a water supply device in which a notch is provided in the discharge bracket connecting the pump section, which houses the pump's mechanical seal, and the motor section at a position where water will accumulate in the event of a leak, and the area below this notch is covered with a water leakage prevention fitting, making it possible to detect a water leak in the mechanical seal. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2004-92438 A Summary of the Invention [Problem to be solved by the invention]

[0006] In the water supply device disclosed in Patent Document 1, when a leak occurs in the mechanical seal, water spurts out from a notch. This water spurting out from the notch is guided by a water leakage prevention fitting so that it always drips downwards. This concentrates the water leakage in one place, making it easy to determine that a water leak has occurred in the mechanical seal.

[0007] However, additional costs are incurred by adding a mechanism such as that described in Patent Document 1. On the other hand, when a liquid leakage sensor is installed in an outdoor pump, it may lead to false alarms due to condensation.

[0008] In view of the above-mentioned problems, the present invention aims to provide a leakage determination device, a leakage monitoring system, a leakage determination method, and a leakage determination program that make it possible to easily and reliably determine whether leakage has occurred in a sealing portion of a pump device, regardless of the environment in which it is installed. [Means for solving the problem]

[0009] In order to achieve the above object, a leakage determination device according to one aspect of the present invention is a leakage determination device for determining whether or not leakage has occurred from a seal portion of a pump device, the leakage determination device being attached to the pump device, The pump device is equipped with a detection data acquisition unit that acquires leakage detection data detected by an attached leakage sensor, a weather data acquisition unit that acquires weather data at a pump installation position where the pump device is installed, and a determination unit that determines whether or not a leakage has occurred and the possibility of a false detection of a leakage based on the leakage detection data and the weather data. Effect of the Invention

[0010] According to the leakage determination device of the present invention, the detection data acquisition unit acquires leakage detection data detected by a leakage sensor attached to the pump device, and the meteorological data acquisition unit acquires meteorological data for the pump installation position where the pump device is installed, and then determines whether leakage has occurred and the possibility of erroneous detection of leakage based on the leakage detection data and the meteorological data. This allows the user to easily and reliably determine that leakage has occurred in the seal without being affected by the environment in which the pump is installed, while referring to the provided information on whether leakage has occurred and the possibility of erroneous detection of leakage.

[0011] Other objects, configurations and effects will become apparent from the detailed description of the invention described below. [Brief description of the drawings]

[0012] [Figure 1] 1 is an overall configuration diagram showing an example of a liquid leakage monitoring system 100 according to a first embodiment. [Diagram 2] 2 is a hardware configuration diagram showing an example of a computer 200 constituting each device of the liquid leakage monitoring system 100. FIG. [Diagram 3] FIG. 2 is a schematic configuration diagram showing an example of a pump device 3. [Figure 4] 1 is a functional block diagram of a liquid leakage monitoring system 100. FIG. [Diagram 5] 4 is a flowchart showing the overall data flow of the liquid leakage monitoring system 100. [Figure 6] 4 is a flowchart showing an operation example of the leakage determination device 40 (part 1). [Figure 7] 6 is a flowchart showing an operation example of the leakage determination device 40 (part 2). [Figure 8] 13 is a diagram showing an example of a display screen of the leakage notification device 5. FIG. [Figure 9] FIG. 1 is an overall configuration diagram showing an example of a liquid leakage monitoring system 101 according to a second embodiment. [Figure 10] FIG. 11 is an overall configuration diagram showing an example of a liquid leakage monitoring system 102 according to a third embodiment. [Figure 11]FIG. 11 is an overall configuration diagram showing an example of a liquid leakage monitoring system 103 according to a fourth embodiment. [Figure 12] FIG. 11 is an overall configuration diagram showing an example of a liquid leakage monitoring system 104 according to a fifth embodiment. [Figure 13] FIG. 13 is an overall configuration diagram showing an example of a liquid leakage monitoring system 105 according to a sixth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment for carrying out the present invention will be described with reference to the drawings. In the following, the scope necessary for the explanation to achieve the object of the present invention will be shown in a schematic manner, and the scope necessary for the explanation of the relevant part of the present invention will be mainly explained, and the parts that are omitted will be explained as being related to the publicly known technology.

[0014] (Embodiment 1) FIG. 1 is a diagram showing an overall configuration of an example of a liquid leakage monitoring system 100 according to a first embodiment.

[0015] The pump device 3, which is the object of leakage determination in the liquid leakage monitoring system 100, is a rotating machine that transports liquids such as water (tap water, sewage, fresh water, seawater), chemical liquids, petroleum (crude oil, refined oil), etc. The pump device 3 is used, for example, in infrastructure facilities such as water supply and sewage systems, plant facilities such as oil refining, power generation, manufacturing, and chemical processes, and systems that utilize any liquid. Note that in this embodiment, the liquid leakage monitoring system 100 is applied to a pump device 3 that transports water, and the explanation will be centered on the case of determining liquid leakage (water leakage) of the pump device 3.

[0016] In addition, there are pump devices 3 with various specifications (structure, material, caliber, discharge pressure, discharge flow rate, motor performance, etc.), and a pump device 3 with appropriate specifications is selected according to the various requirements of the facility or system in which the pump device 3 is used.

[0017] The leakage monitoring system 100 functions as a system that notifies a user (such as a facility manager) or a service person (such as a person who inspects and repairs the pump device 3) of the occurrence of leakage from the pump device 3 as described above. In the following, the user and the service person will both be described as the user.

[0018] The specific configuration of the leakage monitoring system 100 includes one or more pump devices 3, a management device 4 that manages information related to leakage, a leakage notification device 5 that notifies a user of the information related to leakage, and an external weather information providing device 6 that provides external weather information.

[0019] The management device 4 includes a leakage determination device 40 that determines whether leakage has occurred in the pump device 3. The management device 4 is configured to be able to communicate with the pump device 3, the leakage notification device 5, and the external weather information providing device 6 via a network 7. The network 7 transmits and receives data by wired communication or wireless communication, or a combination of wired communication and wireless communication, according to any communication standard. Specifically, for example, a standardized communication network such as the Internet, a communication network managed within a building such as a local network, or a combination of these communication networks can be used. Furthermore, an international standard is typically used as a communication standard for wireless communication. Examples of international standard communication means include IEEE802.15.4, IEEE802.15.1, IEEE802.15.11a, 11b, 11g, 11n, 11ac, 11ad, ISO / IEC14513-3-10, and IEEE802.15.4g. In addition, methods such as Bluetooth (registered trademark), Bluetooth Low Energy, Wi-Fi, ZigBee (registered trademark), Sub-GHz, EnOcean (registered trademark), and LTE can also be used.

[0020] The leakage notification device 5 receives a notification via the network 7 when the management device 4 (leakage determination device 40) determines whether or not a leakage has occurred, and is used to notify the user that a leakage has occurred in the pump device 3 that the user is monitoring.

[0021] The external weather information providing device 6 receives at a predetermined interval the weather in various locations and values ​​measured by precipitation meters, thermometers, hygrometers, and anemometers installed at various observation points, and records the received values ​​as external weather information together with the location information of the measurement points and the measurement date and time. When a request for weather information specifying location information and date and time is received from an external device, the external weather information providing device 6 transmits weather information such as the weather, precipitation, temperature, humidity, and wind speed at the specified date and time at the observation point near the specified location information to the requesting device. Specifically, the external weather information providing device 6 can use a server device that provides weather information managed by the Japan Meteorological Agency or a weather information providing company.

[0022] FIG. 2 is a hardware configuration diagram showing an example of a computer 200 constituting each device of the liquid leakage monitoring system 100 (for example, the pump device 3, the management device 4, the liquid leakage notification device 5, etc.).

[0023] The pump device 3 (particularly, the pump control device 34 shown in FIG. 3 described later), the management device 4, and the leakage Each of the liquid notification devices 5 is configured by a general-purpose or dedicated computer 200. As shown in Fig. 2, the computer 200 includes, as its main components, a bus 210, a processor 212, a memory 214, an input device 216, a display device 218, a storage device 220, a communication I / F (interface) unit 222, an external device I / F unit 224, an I / O (input / output) device I / F unit 226, and a media input / output unit 228. Note that the above components may be omitted as appropriate depending on the application of the computer 200.

[0024] The processor 212 is composed of one or more arithmetic processing devices (such as a central processing unit (CPU), a micro-processing unit (MPU), a digital signal processor (DSP), or a graphics processing unit (GPU)) and operates as a control unit that controls the entire computer 200. The memory 214 stores various data and programs 230 and may be, for example, a volatile memory (DRAM (Dynamic Random Access Memory)) that functions as a main memory. It is composed of internal memory (RAM, static random access memory, etc.) and non-volatile memory (ROM, flash memory, etc.).

[0025] The input device 216 is, for example, a keyboard, a mouse, a numeric keypad, an electronic pen, etc. The output device 217 is, for example, a sound (audio) output device, a vibration device, etc. The display device 218 is, for example, a liquid crystal display, an organic EL display, electronic paper, a projector, etc. The input device 216 and the display device 218 may be integrally configured, such as a touch panel display. The storage device 220 is, for example, a hard disk drive (HDD), a solid state drive (SSD), etc., and stores various data required for the execution of the operating system and the program 230.

[0026] The communication I / F unit 222 is connected to a network 240 (which may be the same as the network 7 in FIG. 1) such as the Internet or an intranet by wire or wirelessly, and transmits and receives data to and from other computers according to a predetermined communication standard. The external device I / F unit 224 is connected to an external device 250 such as a printer or a scanner by wire or wirelessly, and transmits and receives data to and from the external device 250 according to a predetermined communication standard. The I / O device I / F unit 226 is connected to an I / O device 260 such as various sensors and actuators, and transmits and receives various signals and data, such as detection signals from sensors and control signals to actuators, between the I / O device 260. The media input / output unit 228 is composed of a drive device such as a DVD (Digital Versatile Disc) drive or a CD (Compact Disc) drive, and reads and writes data from and to a medium 270 such as a DVD or a CD.

[0027] In the computer 200 having the above configuration, the processor 212 calls the program 230 into a work memory area of ​​the memory 214, executes the program 230, and controls each unit of the computer 200 via the bus 210. The program 230 may be stored in the storage device 220 instead of the memory 214. The program 230 may be recorded in a non-transitory recording medium such as a CD or DVD in an installable file format or an executable file format, and provided to the computer 200 via the media input / output unit 228. The program 230 may be provided to the computer 200 by downloading the program 230 via the communication I / F unit 222 over the network 240. In addition, the computer 200 may realize various functions realized by the processor 212 executing the program 230, for example, with hardware such as a field-programmable gate array (FPGA) or an application specific integrated circuit (ASIC).

[0028] The computer 200 may be, for example, a desktop computer or a portable computer, and may be an electronic device of any type. The computer 200 may be a client computer, a server computer, or a cloud computer.

[0029] (Pump unit 3) FIG. 3 is a schematic configuration diagram showing an example of a pump device 3 according to an embodiment.

[0030] The pump device 3 includes a pump section 32 composed of an impeller, a rotating shaft, bearings, etc., a motor 33 which serves as a drive source for the pump device 3, a pump control device 34 which controls the operation of the pump device 3, and a seal section 35 which is disposed around the rotating shaft of the pump section 32 and composed of a mechanical seal, a gland packing, etc. A liquid leakage sensor 30 is provided below the seal section 35. A temperature sensor 31 is provided on the housing of the pump device 3 near the liquid leakage sensor 30.

[0031] The pump control device 34 includes a motor control unit 340, a position information detection unit 341, a communication control unit 342, and an operation display unit 343. The pump control device 34 is configured from the computer 200 shown in Fig. 2. The motor control unit 340, the position information detection unit 341, the communication control unit 342, and the operation display unit 343 are configured from the communication I / F unit 222, the processor 212, and the storage device 220.

[0032] The motor control unit 340 controls the rotation and stopping, rotation speed, torque, etc. of the motor 33 based on, for example, operation commands from a higher-level management device of the pump control device 34 (for example, a controller (not shown) of the device in which the pump device 3 is incorporated, or an equipment management system (not shown) that manages the device, etc.).

[0033] The location information detection unit 341 acquires location information indicating the pump installation position where the pump device 3 is installed, using a global positioning system (GPS), a connection point of the network 7, wireless communication, or a combination of these.

[0034] The communication control unit 342 transmits and receives various data to and from the management device 4 via the network 7. The various data include leakage detection data detected by the leakage sensor 30, position information acquired by the position information detection unit 341, temperature detection data indicating the temperature detected by the temperature sensor 31, etc. The leakage detection data may include the time when the leakage was detected, in addition to the information indicating the presence or absence of leakage.

[0035] The operation display unit 343 displays that the liquid leakage sensor 30 has detected a liquid leakage. In addition, the current temperature detection data value, the current time, and the like may be displayed.

[0036] 4 is a functional block diagram showing an example of the management device 4 and the liquid leakage notification device 5 according to the embodiment. In the first embodiment, a case where the management device 4 is provided with a liquid leakage determination device 40 will be described below.

[0037] (Leakage determination device 40) The leakage determination device 40 includes a detection data acquisition unit 41, a meteorological data acquisition unit 42, a determination unit 43, and a notification information output unit 44.

[0038] 2, and more specifically, configured as a server-type computer or a cloud-type computer. In this case, the detection data acquisition unit 41, the meteorological data acquisition unit 42, the determination unit 43, and the notification information output unit 44 are configured from the communication I / F unit 222, the processor 212, and the storage device 220.

[0039] The detection data acquisition unit 41 transmits the leakage detection data detected by the leakage sensor 30 attached to the pump device 3 and the temperature detection data detected by the temperature sensor 31 to the pump control device 34. The signal is received from the communication control unit 342.

[0040] The weather data acquisition unit 42 receives the location information acquired by the location information detection unit 341 from the communication control unit 342 of the pump control device 34, and transmits the location information and date and time to the external weather information providing device 6 to receive, as weather data, external weather information for the pump installation position where the pump device 3 is installed. The weather data includes temperature, weather, humidity, wind speed, precipitation amount, etc.

[0041] The determination unit 43 determines whether or not a leak has occurred and the possibility of a false detection of a leak based on the leak detection data acquired from the pump device 3 and the weather data acquired from the external weather information providing device 6. When it is determined that a leak has occurred from the leak detection data, if the amount of precipitation included in the weather data is "0" or the amount of precipitation is equal to or less than a reference value, the leak sensor 30 is not likely to have become wet due to precipitation, and the determination result is that there is a leak. On the other hand, when it is determined that a leak has occurred from the leak detection data, if the amount of precipitation included in the weather data is equal to or greater than a reference value, there is a possibility that the leak sensor 30 has become wet due to precipitation, and the determination result is that there is a possibility of a false detection of a leak.

[0042] Alternatively, when it is determined from the leakage detection data that leakage has occurred, if it is determined from the temperature and humidity included in the weather data that condensation may have occurred at the leakage sensor 30, the determination result is determined to be that there is a possibility of erroneous detection of leakage. On the other hand, when it is determined from the temperature and humidity included in the weather data that condensation may not have occurred at the leakage sensor 30, the determination result is determined to be that leakage has occurred. Note that condensation occurs when the temperature change per hour included in the weather data is greater than a reference value and the humidity included in the weather data is higher than a reference value, but the relationship between the temperature change and humidity at which condensation occurs differs depending on the temperature, so it is preferable to store in advance in the storage device 220 the correspondence relationship between the temperature change and the reference value of humidity when condensation occurs corresponding to the temperature.

[0043] Furthermore, when it is determined from the leakage detection data that leakage has occurred, if the temperature difference between the pump temperature of the temperature sensor 31 and the air temperature of the weather data is large and it is determined that condensation may have occurred at the leakage sensor 30, the determination result is that there is a possibility of erroneous detection of leakage. On the other hand, if the temperature difference between the temperature of the pump device 3 detected by the temperature sensor 31 and the air temperature of the weather data is small and it is determined that there is no possibility of condensation occurring at the leakage sensor 30, the determination result is that there is leakage. Note that condensation occurs when the temperature difference between the temperature indicated by the temperature detection data obtained by the temperature sensor 31 and the air temperature included in the weather data is large and the humidity included in the weather data is higher than a reference value. However, since the relationship between the temperature difference and humidity at which condensation occurs varies depending on the air temperature, it is preferable to store in advance in the storage device 220 the correspondence relationship between the temperature difference and the reference value of humidity when condensation occurs corresponding to the air temperature.

[0044] The notification information output unit 44 outputs notification information to the leakage notification device 5 for causing the notification unit 51 to notify the determination result indicating the presence or absence of leakage determined by the determination unit 43 and the possibility of erroneous detection of leakage. If the leakage notification device 5 is equipped with a display unit 52 such as a display as the notification unit 51, the notification information output unit 44 outputs display information (notification information) to the leakage notification device 5 for causing the display unit 52 to display the determination result indicating the presence or absence of leakage and the possibility of erroneous detection.

[0045] The notification information includes the pump installation position, the pump model number, whether or not a leak has occurred, and whether or not there is a possibility of a false detection. In addition, when it is determined that there is a possibility of a false detection of a leak, the reason for the determination may be included in the notification information and output. Specific reasons for the determination include the possibility of water wetting due to precipitation and the possibility of condensation occurring in the leak sensor 30. In addition, the occurrence of condensation can be caused by Since condensation can occur due to temperature changes or due to a temperature difference between the temperature at the pump installation location and the air temperature, it is preferable to include in the notification information which cause of condensation has been determined. Furthermore, the notification information may also include meteorological information for the pump installation location.

[0046] (Leakage notification device 5) The leakage notification device 5 includes a determination result receiving unit 50 and a notification unit 51. The leakage notification device 5 is configured as a computer 200 shown in Fig. 2, and specifically, is configured as a client-type computer or a portable computer. In this case, the determination result receiving unit 50 is configured as a communication I / F unit 222 and a processor 212, and the notification unit 51 is configured as the processor 212, a display device 218, and an output device 217. In particular, when the notification unit 51 displays on the display device 218, it functions as the display unit 52.

[0047] The judgment result receiving unit 50 receives, in addition to the judgment result indicating whether or not a leak has occurred output by the leakage judgment device 40, display information (notification information) including the reason for the judgment when it is determined that there is a possibility of a false detection of a leak.

[0048] The display unit 52 displays the received display information indicating the determination result showing whether or not leakage has occurred on the display device 218. Furthermore, if it is determined that there is a possibility of erroneous detection of leakage, it also displays display information indicating the reason for the determination on the display device 218.

[0049] The notification unit 51 that notifies the notification information may use the output device 217 to notify the user of the determination result that there is leakage by sound or voice, or by vibration that vibrates the leakage notification device 5, instead of by display using the display unit 52. Furthermore, when it is determined that there is leakage by using both, the notification may be a combination of the display of the determination result indicating the occurrence of leakage by the display unit 52 and the notification by sound or voice or vibration. When it is determined that there is leakage but there is a possibility of erroneous detection of leakage, the notification may be a combination of the display of the determination result on the display unit 52 and the display information of the reason for the determination, in addition to the determination result, and the notification by sound or voice or vibration.

[0050] (Leakage determination method) Fig. 5 is a flowchart showing the overall data flow of the leakage monitoring system 100 which monitors leakage from the pump device 3. Figs. 6 and 7 are flowcharts showing an example of the operation of the leakage determination device 40. Fig. 8 is a diagram showing an example of the display screen of the leakage notification device 5. Figs. 5 to 8 are used to show how the leakage sensor 30 and the temperature sensor 31 output leakage detection data and temperature data at a predetermined period. The flow of processing for detecting the detection data and determining whether or not a liquid leak has occurred and the possibility of a false detection of a liquid leak will be described.

[0051] As shown in FIG. 5, first, in step S10, leakage detection data detected by the leakage sensor 30 of the pump device 3 and temperature detection data detected by the temperature sensor 31 are transmitted to the communication control unit 10. Then, in step S11, the position information detected by the position information detection unit 341 of the pump device 3 is transmitted from the communication control unit 342 to the liquid leakage determination device 40. Furthermore, if the liquid leakage sensor 30 detects a liquid leakage, a display that the liquid leakage sensor 30 has detected a liquid leakage is displayed on the operation display unit 343 of the pump device 3. In addition, data that may lead to a false detection, such as the temperature detected by the temperature sensor 31, is displayed on the operation display unit 343. This may be done.

[0052] The leakage detection data and the temperature detection data are transmitted at a predetermined cycle to the leakage determination device 40. When the leakage detection data and the temperature detection data are received by the leakage determination device 40, in step S20, the leakage determination device 40 executes leakage determination processing.

[0053] 6, in the leakage determination process, first, in step S200, the detection data acquisition unit 41 receives (acquires) the leakage detection data and temperature detection data transmitted from the pump device 3. Then, in step S210, the weather data acquisition unit 42 receives the location information transmitted from the pump device 3. In step S211, the weather data acquisition unit 42 transmits a request for weather information together with the location information and the current time to the external weather information providing device 6. Then, in step S212, external weather information corresponding to the location information and time is received (acquired) from the external weather information providing device 6, and is temporarily stored in the work memory area of ​​the memory 214 as weather data for the pump installation position.

[0054] In step S220, the determination unit 43 determines whether or not the leakage detection data indicates "there is leakage", and if it does not indicate "there is leakage" (step S220 is "No"), the process proceeds to step S230 and determines "there is no leakage". Then, the process proceeds to step S280 in Fig. 7, where the notification information output unit 44 generates display information for causing the display unit 52 of the leakage notification device 5 to display the determination result.

[0055] The displayed information includes the pump installation location, the pump model number, the leakage judgment result indicating whether leakage has occurred and whether there is a possibility of a false detection, the reason for the false detection if a false detection has been determined, and the temperature, weather, humidity, wind speed, precipitation, etc. included in the weather data. In the example of the display screen in FIG. 8, the judgment result indicates whether leakage has occurred and the possibility of a false detection, and the reason for the false detection. As reasons for the false detection, "1. Water leakage due to precipitation," "2. Condensation due to temperature changes," and "3. Condensation due to the temperature difference between the pump temperature and the air temperature" are displayed. Furthermore, the temperature, weather, humidity, wind speed, and precipitation are displayed as meteorological information for the pump installation location.

[0056] If it is determined in step S230 that there is no leakage, the notification information output unit 44 generates display information in step S280 indicating that there is no leakage and no erroneous detection of leakage, and that none of the items in the "Reasons for erroneous detection" are met. The display information also includes meteorological data. In step S281, the notification information output unit 44 transmits (outputs) the generated display information to the leakage notification device 5.

[0057] On the other hand, in step S220, if the leakage detection data indicates that "leakage has occurred" (step S220 is "Yes"), the determination unit 43 proceeds to step S240, where it determines whether or not the amount of precipitation included in the weather data indicates that "precipitation has occurred." If the amount of precipitation is equal to or greater than a reference value (step S240 is "Yes"), it proceeds to step S241, where it determines that there is a possibility of wetness due to precipitation. Furthermore, in step S242, since there is a possibility of wetness due to precipitation, it determines that "there is a possibility of erroneous detection of leakage," and proceeds to step S280 in FIG. 7. In step S280, the notification information output unit 44 generates display information for displaying the determination result on the display unit 52 of the leakage notification device 5. Since it has been determined that "leakage has occurred" but "there is a possibility of erroneous detection of leakage," display information is generated indicating that "leakage has occurred" is "yes," that "possibility of erroneous detection" is "yes," and further indicating that "reason for erroneous detection determination" corresponds to "1. Wetness due to precipitation." In step S281, the notification information output unit 44 transmits the display information to the leakage notification device 5.

[0058] Furthermore, in step S240, if the amount of precipitation included in the weather data is equal to or less than a reference value (step S240 is "No"), the determination unit 43 proceeds to step S250 in FIG. 7 to determine the possibility of condensation. In step S250, if the change in temperature per hour included in the weather data is greater than a reference value and the humidity included in the weather data is higher than a reference value (step S250 is "Yes"), there is a possibility of condensation, so the process proceeds to step S251. In step S252, there is a possibility of condensation, so the determination unit 43 determines "possibility of erroneous detection of leakage". The notification information output unit 44 determines that "leakage has occurred" and proceeds to step S280. In step S280, the notification information output unit 44 generates display information to display the determination result on the display unit 52 of the leakage notification device 5. Since it has been determined that "leakage has occurred" but "there is a possibility of erroneous detection of leakage", display information is generated indicating that "leakage has occurred" is "occurred", that "possibility of erroneous detection" is "yes", and further indicating that the "reason for erroneous detection determination" corresponds to "2. Condensation due to change in temperature". In step S281, the notification information output unit 44 transmits the display information to the leakage notification device 5.

[0059] In addition, in step S250, if the conditions that the change in temperature per hour included in the weather data is greater than the reference value and the humidity included in the weather data is higher than the reference value are not satisfied (step S250 is "No"), the determination unit 43 proceeds to step S260 since there is no possibility of condensation. In step S260, the determination unit 43 determines whether condensation occurs due to the temperature difference between the temperature indicated by the temperature detection data obtained by the temperature sensor 31 of the pump device 3 and the air temperature included in the weather data. If the temperature difference between the temperature indicated by the temperature detection data obtained by the temperature sensor 31 of the pump device 3 and the air temperature included in the weather data is greater than the reference value and the humidity included in the weather data is higher than the reference value (step S260 is "Yes"), there is a possibility of condensation, so the process proceeds to step S261. In step S262, there is a possibility of condensation, so the determination unit 43 determines that "there is a possibility of erroneous detection of liquid leakage" and proceeds to step S280. In step S280, the notification information output unit 44 generates display information for displaying the determination result on the display unit 52 of the liquid leakage notification device 5. Since it has been determined that "leakage has occurred" but "there is a possibility of erroneous detection of leakage," display information is generated indicating that "leakage has occurred" is "yes," that "possibility of erroneous detection" is "yes," and further indicating that "reason for erroneous detection" corresponds to "3. Condensation due to temperature difference between pump temperature and air temperature." In step S281, the notification information output unit 44 transmits the display information to the leakage notification device 5.

[0060] In addition, in step S260, if the condition that the temperature difference between the temperature indicated by the temperature detection data obtained by the temperature sensor 31 and the air temperature included in the weather data is greater than the reference value and the humidity included in the weather data is greater than the reference value is not satisfied (step S260 is "No"), there is no possibility of condensation, and the process proceeds to step S270. In any of steps S240, S250, and S260, if the liquid leakage sensor 30 does not determine that there is water exposure or condensation, the process proceeds to step S270 and determines that "liquid leakage is present" and proceeds to step S280. In step S280, the notification information output unit 44 generates display information for displaying the determination result on the display unit 52 of the liquid leakage notification device 5. Since it is determined that "liquid leakage has occurred" but "there is no possibility of erroneous detection of liquid leakage", the process generates display information that indicates that "liquid leakage has occurred" and that "there is no possibility of erroneous detection" and that none of the items in the "reason for erroneous detection determination" are applicable. In step S281, the notification information output unit 44 transmits display information to the leakage notification device 5.

[0061] In this manner, the leakage determination process (step S20) shown in Figures 6 and 7 is completed. In the leakage determination process, step S200 corresponds to a detection data acquisition step, steps S210 to S212 correspond to a weather data acquisition step, steps S220 to S270 correspond to a determination step, and steps S280 to S281 correspond to a notification information output step.

[0062] Returning to Fig. 5, the display method in the liquid leakage notification device 5 will be described. In step S40, the determination result receiving unit 50 of the liquid leakage notification device 5 receives display information from the liquid leakage determination device 40, and in step S41, the display unit 52 generates an image showing the liquid leakage determination result ("yes" or "no" if leakage has occurred, "yes" or "no" if there is a possibility of erroneous detection, and a selection of 1 to 3 for the determination reason of erroneous detection) and meteorological data information (air temperature, weather, temperature, wind speed, and amount of precipitation) in accordance with the display information, as shown in Fig. 8, and displays it on the display device 218.

[0063] In the above, the current time is transmitted to the external weather information providing device 6, and the external weather information at the current time is The above describes the case where external weather information is obtained, but depending on the communication conditions, there may be a discrepancy between the time when the leak detection data from the leak sensor 30 is received and the time when the leak occurs. Therefore, if necessary, the detection time of the leak, which is included in the leak detection data, may be transmitted to the external weather information providing device 6 instead of the current time, to obtain external weather information.

[0064] In addition, in the above, a case has been described in which the leakage determination device 40 receives leakage detection data from the leakage sensor 30 at a predetermined cycle, but the leakage detection data, temperature detection data detected by the temperature sensor 31, and position information acquired by the position information detection unit 341 may be received from the communication control unit 342 of the pump device 3 only when the leakage sensor 30 detects leakage. In this case, the processes of steps S220 and S230 in the flowchart of Fig. 6 may be omitted. Furthermore, until the leakage sensor 30 detects leakage, no display is made on the leakage notification device 5, or the occurrence of leakage may be displayed as "not occurring."

[0065] In the above, the location information of the pump device 3 is obtained using the GPS of the location information detection unit 341, but the location information detection unit 341 may store the pump installation location input by the user via the operation display unit 343 when the pump is installed, and may obtain the pump installation location as the location information. In addition, when the pump installation location of each pump device 3 is known in advance, identification information may be assigned to the pump control device 34 of the pump device 3, and when the communication control unit 342 transmits the leakage detection data, etc. to the leakage determination device 40, the identification information may be transmitted together with the data. By storing the location information corresponding to the identification information, the leakage determination device 40 can transmit the location information corresponding to the identification information to the external weather information providing device 6 to obtain external weather information. Alternatively, the pump installation location may be identified using an IP address assigned to the pump control device 34 instead of the identification information.

[0066] As described above, according to the leakage determination device 40 and leakage monitoring system 100 of this embodiment, by combining the leakage detection data detected by the leakage sensor 30 of the pump device 3 with meteorological data, it is possible to determine whether or not there is a possibility of a false detection due to rainfall or condensation, and to accurately notify the user that a leakage has occurred.

[0067] (Embodiment 2) Next, a second embodiment will be described. Fig. 9 is an overall configuration diagram showing an example of a liquid leakage monitoring system 101 according to a second embodiment. In this embodiment, a case will be described in which weather detection data detected by a weather sensor 36 provided at a pump installation position is acquired as weather data. Configurations having the same functions as those in the first embodiment will be assigned the same reference numerals and detailed description will be omitted.

[0068] As shown in FIG. 9, the leakage determination device 40 includes a detection data acquisition unit 41, a weather data acquisition unit 45, a determination unit 43, and a notification information output unit 44, and the leakage notification device 5 includes a determination result receiving unit 50 and a notification unit 51. The pump device 3 is provided with a leakage sensor 30 below the seal unit 35, and a temperature sensor 31 is provided on the housing of the pump device 3 near the leakage sensor 30. The weather sensor 36 includes an air temperature sensor 360, a humidity sensor 361, and a precipitation sensor 362. Note that, although the second embodiment will be described with respect to a case in which the notification unit 51 notifies using the display unit 52, notification by sound or voice, or by vibration, can be used as in the first embodiment.

[0069] The air temperature sensor 360 measures the outside air temperature at the pump installation position of the pump device 3, the humidity sensor 361 measures the humidity at the pump installation position, and the precipitation sensor 362 measures the amount of precipitation at the pump installation position.

[0070] The communication control unit 342 of the pump device 3 acquires the outside temperature, humidity, precipitation amount, etc. detected by the weather sensor 36 provided at the pump installation position as weather detection data, and transmits it to the leakage determination device 40.

[0071] In the first embodiment, the weather data acquisition unit 42 determines whether or not a liquid leak has occurred and the possibility of a false detection of a liquid leak using the external weather information received from the external weather information providing device 6 as weather data, but in the second embodiment, the liquid leakage determination device 40 receives weather detection data as weather data at the weather data acquisition unit 45, and the determination unit 43 determines whether or not a liquid leak has occurred and the possibility of a false detection of a liquid leak, similar to the first embodiment, using the weather data detected by the weather sensor 36, the liquid leakage detection data detected by the liquid leakage sensor 30 received from the pump device 3, and the temperature detection data detected by the temperature sensor 31. Furthermore, similar to the first embodiment, display information is generated and transmitted to the liquid leakage notification device 5, and the liquid leakage notification device 5 displays the display information received by the determination result receiving unit 50 on the display unit 52.

[0072] The leakage determination method of the second embodiment is similar to the method described in the first embodiment using the flowcharts of Figures 5 to 7 and the display screen of the leakage notification device 5 in Figure 8, except that weather data is obtained from the weather sensor 36, so detailed description will be omitted.

[0073] (Embodiment 3) 10 is an overall configuration diagram showing an example of a liquid leakage monitoring system 102 according to the third embodiment. In the first embodiment, a case where the liquid leakage determination device 40 is provided in the management device 4 is described, but in the third embodiment, a case where the liquid leakage determination device 40 is provided in the pump device 3 is described.

[0074] The third embodiment has substantially the same configuration as the first embodiment, except that a leakage determination device 40 is provided in the pump control device 34 of the pump device 3. The substantially same configuration as the first embodiment is given the same reference numerals, and detailed description will be omitted, and only the differences will be described.

[0075] As shown in FIG. 10, the liquid leakage notification device 5 includes a determination result receiving unit 50 and a notification unit 51 (display unit 52), and the pump device 3 includes a liquid leakage sensor 30 and a temperature sensor 31. The liquid leakage determination device 40 provided in the pump control device 34 transmits location information of the pump installation position to the external weather information providing device 6, and uses the external weather information acquired from the external weather information providing device 6 as weather data. Using this weather data, the liquid leakage detection data detected by the liquid leakage sensor 30 and the temperature detection data detected by the temperature sensor 31 received from the pump device 3, the presence or absence of liquid leakage and the possibility of erroneous detection of liquid leakage are determined in the same manner as in the first embodiment. Furthermore, the liquid leakage determination device 40 generates display information and transmits it to the liquid leakage notification device 5, and the liquid leakage notification device 5 displays the display information received by the determination result receiving unit 50 on the display unit 52.

[0076] The leakage determination method of the third embodiment is the same as the method explained in the first embodiment using the flowcharts of Figures 5 to 7 and the display screen of the leakage notification device 5 in Figure 8, so a detailed explanation will be omitted.

[0077] (Embodiment 4) 11 is an overall configuration diagram showing an example of a liquid leakage monitoring system 103 according to a fourth embodiment. In the second embodiment, a case was described in which the liquid leakage determination device 40 is provided in the management device 4, and weather detection data detected by the weather sensor 36 provided at the pump installation position where the pump device 3 is placed is acquired as weather data. In the fourth embodiment, a case in which the liquid leakage determination device 40 is provided in the pump device 3 will be described.

[0078] In the fourth embodiment, a pump control device 34 of a pump device 3 is provided with a leakage determination device 40. Except for this, the second embodiment has substantially the same configuration as the second embodiment. The same reference numerals are used for the substantially same configuration as the second embodiment, and detailed description is omitted, and only the differences will be described.

[0079] As shown in FIG. 11, the liquid leakage notification device 5 includes a determination result receiving unit 50 and a notification unit 51 (display unit 52), and the pump device 3 is provided with a liquid leakage sensor 30 and a temperature sensor 31. The liquid leakage determination device 40 provided in the pump control device 34 uses weather detection data detected by the weather sensor 36 as weather data. Using the weather data detected by the weather sensor 36, the liquid leakage detection data detected by the liquid leakage sensor 30 received from the pump device 3, and the temperature detection data detected by the temperature sensor 31, it determines the presence or absence of a liquid leakage and the possibility of a false detection of a liquid leakage, as in the second embodiment. Furthermore, the liquid leakage determination device 40 generates display information and transmits it to the liquid leakage notification device 5, and the liquid leakage notification device 5 displays the display information received by the determination result receiving unit 50 on the display unit 52.

[0080] The leakage determination method of the fourth embodiment is similar to the method described in the first embodiment using the flowcharts of Figures 5 to 7 and the display screen of the leakage notification device 5 in Figure 8, except that weather data is obtained from the weather sensor 36, so detailed description will be omitted.

[0081] (Embodiment 5) 12 is an overall configuration diagram showing an example of a liquid leakage monitoring system 104 according to the fifth embodiment. In the first embodiment, a case where the liquid leakage determination device 40 is provided in the management device 4 is described, but in the fifth embodiment, a case where the liquid leakage determination device 40 is provided in the liquid leakage notification device 5 is described.

[0082] The fifth embodiment has substantially the same configuration as the first embodiment, except that a leakage determination device 40 is provided in the leakage notification device 5. The same reference numerals are used for the substantially same configuration as the first embodiment, and detailed explanations are omitted, and only the differences will be explained.

[0083] As shown in FIG. 12, the liquid leakage notification device 5 includes a liquid leakage determination device 40 and a notification unit 51 (display unit 52), and the pump device 3 is provided with a liquid leakage sensor 30 and a temperature sensor 31. The liquid leakage determination device 40 provided in the liquid leakage notification device 5 transmits location information of the pump installation position to the external weather information providing device 6, and uses the external weather information acquired from the external weather information providing device 6 as weather data. Using this weather data, the liquid leakage detection data detected by the liquid leakage sensor 30 and the temperature detection data detected by the temperature sensor 31 received from the pump device 3, the presence or absence of liquid leakage and the possibility of erroneous detection of liquid leakage are determined, as in the first embodiment. Furthermore, the liquid leakage determination device 40 generates display information and displays the display information on the display unit 52.

[0084] The leakage determination method of the fifth embodiment is the same as the method explained in the first embodiment using the flowcharts of Figures 5 to 7 and the display screen of the leakage notification device 5 in Figure 8, so a detailed explanation will be omitted.

[0085] (Embodiment 6) 13 is an overall configuration diagram showing an example of a liquid leakage monitoring system 105 according to the sixth embodiment. In the second embodiment, a case was described in which the liquid leakage determination device 40 is provided in the management device 4, and weather detection data detected by the weather sensor 36 provided at the pump installation position where the pump device 3 is placed is acquired as weather data. In the sixth embodiment, a case will be described in which the liquid leakage determination device 40 is provided in the liquid leakage notification device 5.

[0086] The sixth embodiment has substantially the same configuration as the second embodiment, except that a leakage determination device 40 is provided in the leakage notification device 5. The substantially same configuration as the second embodiment is given the same reference numerals, and detailed description is omitted, and only the differences will be described.

[0087] As shown in FIG. 13, the leakage notification device 5 includes a leakage determination device 40 and a notification unit 51 (display unit 52), and the pump device 3 is provided with a leakage sensor 30 and a temperature sensor 31. The leakage determination device 40 provided in the leakage notification device 5 uses weather detection data detected by the weather sensor 36 as weather data. Using the weather data detected by the weather sensor 36, leakage detection data detected by the leakage sensor 30 received from the pump device 3, and temperature detection data detected by the temperature sensor 31, it determines the presence or absence of leakage and the possibility of erroneous detection of leakage, similarly to the second embodiment. Furthermore, the leakage determination device 40 generates display information and displays the display information on the display unit 52.

[0088] The leakage determination method of the sixth embodiment is similar to the method described in the first embodiment using the flowcharts of Figures 5 to 7 and the display screen of the leakage notification device 5 of Figure 8, except that weather data is obtained from the weather sensor 36, so detailed description will be omitted.

[0089] In the above third to sixth embodiments, the notification unit 51 performs notification using the display unit 52. However, as in the first embodiment, notification by sound or voice, or notification by vibration can be used.

[0090] (Other embodiments) The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the present invention. All such modifications are included in the technical concept of the present invention.

[0091] Although the pump device 3 according to the above embodiment is described as being installed outdoors, it may be installed indoors. When the pump device 3 is installed indoors, the processes of steps S240, S241, and S242 in the flowchart of Fig. 6 may be omitted. Also, when the pump device 3 is installed indoors, the precipitation sensor 362 may be omitted from the weather sensor 36 in the above-mentioned second, fourth, and sixth embodiments.

[0092] Furthermore, the temperature sensor 31 provided in the pump device 3 according to the above embodiment may be omitted. In this case, the processes of steps S260, S261, and S263 in the flowchart of FIG.

[0093] In addition, the leakage determination device 1 according to the above embodiment has been described as executing the leakage determination process shown in Fig. 6 and Fig. 7 as a method for determining the presence or absence of leakage and the possibility of erroneous detection of leakage based on leakage detection data and meteorological data, but the leakage determination process may be executed using a learning model based on machine learning. The learning model is obtained, for example, by using leakage detection data and meteorological data as input data, and using the presence or absence of leakage and the possibility of erroneous detection of leakage as output data, and learning the correlation between the input data and the output data by machine learning. The machine learning here is called supervised learning, and any machine learning method such as a neural network (including deep learning), a decision tree, ensemble learning, clustering, multivariate analysis, or a support vector machine may be adopted.

[0094] (program) The present invention can be provided in the form of a program (leakage determination program) 230 that causes a computer 200 shown in FIG. 2 to function as each unit included in the leakage determination device 40 according to the above embodiment. [Explanation of symbols]

[0095] 3...pump device, 4...management device, 5...leakage notification device, 6...External weather information providing device, 7...Network, 30: liquid leakage sensor, 31: temperature sensor, 32: pump section, 33: motor, 34... pump control device, 35... seal portion, 36... weather sensor 40: Liquid leakage determination device, 41: Detection data acquisition unit, 42, 45: Weather data acquisition unit, 43...determination section, 44...notification information output section, 50: judgment result receiving unit, 51: notification unit, 52: display unit, 100~105...Leakage monitoring system, 200... computer, 210... bus, 212... processor, 214... memory, 216...input device, 217...output device, 218...display device, 220: storage device; 222: communication I / F unit; 224: external device I / F unit; 226... I / O device I / F unit, 228... media input / output unit, 230...program, 240...network, 250...external device, 260...I / O devices, 270...media, 340: motor control unit, 341: position information detection unit, 342: communication control unit, 343...Operation display section, 360...temperature sensor, 361...humidity sensor, 362...precipitation sensor

Claims

1. A leakage determination device for determining whether leakage has occurred from a seal portion of a pump device, comprising: a detection data acquisition unit that acquires leakage detection data detected by a leakage sensor attached to the pump device; a meteorological data acquisition unit that acquires meteorological data at a pump installation position where the pump device is installed; a determination unit that determines whether or not the leakage has occurred and the possibility of erroneous detection of the leakage based on the leakage detection data and the meteorological data, The determination unit is When it is determined from the leakage detection data that the leakage has occurred, and when it is determined from the amount of precipitation included in the weather data that there is a possibility of water damage due to precipitation by the leakage sensor, it is determined that there is a possibility of erroneous detection of the leakage. Liquid leakage determination device.

2. A leakage determination device for determining whether leakage has occurred from a seal portion of a pump device, comprising: a detection data acquisition unit that acquires leakage detection data detected by a leakage sensor attached to the pump device; a meteorological data acquisition unit that acquires meteorological data at a pump installation position where the pump device is installed; a determination unit that determines whether or not the leakage has occurred and the possibility of erroneous detection of the leakage based on the leakage detection data and the meteorological data, The detection data acquisition unit Further acquiring temperature detection data detected by a temperature sensor attached to the pump device; The determination unit is When it is determined from the leakage detection data that the leakage has occurred, and when it is determined from the temperature detection data and the air temperature and humidity included in the weather data that there is a possibility of condensation at the leakage sensor, it is determined that there is a possibility of erroneous detection of the leakage. Liquid leakage determination device.

3. The determination unit: if it is determined from the leakage detection data that the leakage has occurred, determining whether or not there is a possibility of the condensation occurring due to a change in temperature depending on whether or not the change in temperature included in the weather data is greater than a reference value and whether or not the humidity included in the weather data is higher than a reference value; if it is determined from the leakage detection data that the leakage has occurred, the presence or absence of the possibility of condensation due to the temperature difference between the pump temperature and the air temperature is determined depending on whether or not the temperature difference between the temperature detection data and the air temperature included in the weather data is greater than a reference value and whether or not the humidity included in the weather data is higher than a reference value; The leakage detection device according to claim 2 .

4. The meteorological data acquisition unit is acquiring, as the weather data, external weather information at the pump installation position provided from an external weather information providing device based on location information indicating the pump installation position, or acquiring, as the weather data, weather detection data detected by a weather sensor provided at the pump installation position; The leakage detection device according to any one of claims 1 to 3.

5. A notification information output unit outputs notification information for notifying a notification unit of the determination result determined by the determination unit. The leakage detection device according to any one of claims 1 to 4.

6. The notification information output unit outputting the notification information including a reason for determining that there is a possibility of erroneous detection of the leakage as the determination result; The leakage detection device according to claim 5 .

7. A management device that operates as the leakage determination device according to claim 5 or 6; One or more of the pump devices capable of communicating with the management device; one or more leakage notification devices each having the notification unit and capable of communicating with the management device; The detection data acquisition unit receiving the leak detection data from the pump device; The notification information output unit transmitting the notification information to the liquid leakage notification device; Leak monitoring system.

8. a leakage notification device that operates as the leakage determination device according to claim 5 or 6 and has the notification unit; one or more of the pump devices capable of communicating with the leakage notification device; The detection data acquisition unit receiving the leakage detection data from the pump device; Leak monitoring system.

9. The pump device that operates as the leakage determination device according to claim 5 or 6; one or more leakage notification devices each having the notification unit and capable of communicating with the pump device; The notification information output unit transmitting the notification information to the liquid leakage notification device; Leak monitoring system.

10. The meteorological data acquisition unit is receiving, from the pump device, location information indicating a pump installation position, and receiving, as the weather data, external weather information at the pump installation position provided from an external weather information providing device based on the location information, or receiving, as the weather data, weather detection data detected by a weather sensor provided at the pump installation position; 9. A liquid leakage monitoring system according to claim 7 or 8.

11. A method for determining whether or not a liquid is leaking from a seal portion of a pump device, comprising the steps of: a detection data acquisition step of acquiring leakage detection data detected by a leakage sensor attached to the pump device; a meteorological data acquisition step of acquiring meteorological data at a position where the pump device is installed; a determination step of determining whether or not the leakage has occurred and the possibility of erroneous detection of the leakage based on the leakage detection data and the meteorological data, The determination step includes: When it is determined from the leakage detection data that the leakage has occurred, and when it is determined from the amount of precipitation included in the weather data that there is a possibility of water damage due to precipitation by the leakage sensor, it is determined that there is a possibility of erroneous detection of the leakage. Leakage determination method.

12. A method for determining whether or not a liquid is leaking from a seal portion of a pump device, comprising the steps of: a detection data acquisition step of acquiring leakage detection data detected by a leakage sensor attached to the pump device; a meteorological data acquisition step of acquiring meteorological data at a position where the pump device is installed; a determination step of determining whether or not the leakage has occurred and the possibility of erroneous detection of the leakage based on the leakage detection data and the meteorological data, The detection data acquisition step includes: Further acquiring temperature detection data detected by a temperature sensor attached to the pump device; The determination step includes: When it is determined from the leakage detection data that the leakage has occurred, and when it is determined from the temperature detection data and the air temperature and humidity included in the weather data that there is a possibility of condensation at the leakage sensor, it is determined that there is a possibility of erroneous detection of the leakage. Leakage determination method.

13. The determination step comprises: if it is determined from the leakage detection data that the leakage has occurred, determining whether or not there is a possibility of the condensation occurring due to a change in temperature depending on whether or not the change in temperature included in the weather data is greater than a reference value and whether or not the humidity included in the weather data is higher than a reference value; if it is determined from the leakage detection data that the leakage has occurred, the presence or absence of the possibility of condensation due to the temperature difference between the pump temperature and the air temperature is determined depending on whether or not the temperature difference between the temperature detection data and the air temperature included in the weather data is greater than a reference value and whether or not the humidity included in the weather data is higher than a reference value; The leakage determination method according to claim 12.

14. A computer is caused to function as each unit included in the leakage determination device according to any one of claims 1 to 6. Leak detection program.

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