WO2022080157A1

WO2022080157A1 - Monitoring system, monitoring device, and machine monitoring method

Info

Publication number: WO2022080157A1
Application number: PCT/JP2021/036502
Authority: WO
Inventors: 倩梁; 泰雅山田; 裕太坂巻
Original assignee: 株式会社荏原製作所
Priority date: 2020-10-13
Filing date: 2021-10-01
Publication date: 2022-04-21
Also published as: TW202232270A; JP2022064023A

Abstract

This monitoring system comprises: a monitoring device that detects the value of a monitored item of a monitored machine; and a higher-level apparatus. The monitoring device can store inherent information including a threshold value for the monitored item, said threshold value serving as a trigger to start a prescribed action. The higher-level apparatus is provided separated from the monitored machine, and collects monitoring-related information from the monitoring device, said monitoring-related information including the inherent information and detection information. Additionally, the higher-level apparatus appropriately collects the monitoring-related information from the monitoring device, and saves the inherent information if the same is not yet saved. The higher-level apparatus compares installation condition information collected from the monitoring device and saved installation condition information, and if there is a difference, transmits response information to the monitoring device, said response information at least including a portion of the threshold value or values of the saved inherent information, said portion having not been included in the inherent information collected from the monitoring device. Among the threshold value or values received from the higher-level apparatus, the monitoring device stores at least the portion that is not yet stored.

Description

Monitoring system, monitoring device and machine monitoring method

This disclosure relates to a monitoring system, a monitoring device, and a machine monitoring method, and particularly to a monitoring system, a monitoring device, and a machine monitoring method that simplifies the work of setting a threshold value for the monitoring device.

For example, in a pump facility that transfers a fluid, a sensor attached to the pump generally detects a state quantity such as vibration, temperature, and flow rate. Pump systems including such pumps and sensors include: In addition to the pump and the sensor, the pump system includes an electric motor having a rotating shaft connected to the main shaft of the pump, and a control device provided integrally with the electric motor. The control device stores the threshold value for the sensor measurement value and the inspection item in association with each other, and when the sensor measurement value exceeds the corresponding threshold value, the control device transfers the corresponding inspection item to the external terminal device. Notify (see, for example, Japanese Patent Application Laid-Open No. 2017-180349).

If the control device in which the threshold value for the sensor measurement value and the inspection item are associated is independent of the monitored machine such as a pump, one control device can control multiple monitored machines. Is suitable. The threshold value for the measured value of the sensor may be large, and even if the monitored machine to which the sensor is attached is of the same type, it often differs depending on the installation environment and the operating condition of the monitored machine. On the other hand, the sensor generally has a shorter life than the monitored machine, and therefore tends to be replaced more frequently than the monitored machine. When the sensor is replaced for a machine to be monitored that is continuously used, it is necessary to reset the threshold value, but since there are a huge number of types of threshold values, it takes time and effort to reset the threshold value each time the sensor is replaced.

The present disclosure relates to providing a monitoring system, a monitoring device, and a machine monitoring method that can simplify the work of setting a threshold value for a monitoring device such as a sensor in view of the above-mentioned problems.

The monitoring system according to the first aspect is a monitoring device that detects the value of the monitoring target item of the monitoring target machine, and the information on the installation status of the monitoring device and the monitoring target item that triggers a predetermined operation. Monitoring-related information including a monitoring device capable of storing unique information including a threshold value of the value of, the unique information from the monitoring device, and detection information regarding the value of the monitoring target item detected by the monitoring device. The higher-level device includes a higher-level device provided at a position away from the monitored machine, and the higher-level device collects the monitoring-related information from the monitoring device at a predetermined timing. When the unique information of the monitoring-related information collected from the monitoring device is not saved, at least the unique information is saved, and the information of the installation state among the unique information collected from the monitoring device is saved. When it is determined that the monitoring device has been replaced and it is determined that the monitoring device has been replaced when there is a difference by comparing with the information on the installation state, the stored unique information is stored. The monitoring device is configured to transmit reply information including at least the threshold value of the portion of the thresholds that is not included in the unique information collected from the exchanged monitoring device to the monitoring device. It is configured to store at least the threshold value of the portion of the threshold value received from the higher-level device that is not stored.

With this configuration, if the monitoring device does not include a threshold value, the threshold value stored in the host device can be included in the reply information and sent to the monitoring device, and when the monitoring device is replaced, a comparison can be made. It is possible to simplify the work of setting the threshold value to the monitoring device, which tends to be complicated.

As the monitoring system according to the second aspect, the monitoring system according to the first aspect is provided with a plurality of the monitoring devices, and the higher-level device stores the unique information and whether or not the monitoring device has been exchanged. The determination and the transmission of the reply information to the monitoring device may be configured to be performed individually for each of the monitoring devices.

With this configuration, even if there are multiple monitoring devices and the replacement time is different, the threshold value can be taken over appropriately.

As the monitoring system according to the third aspect, in the monitoring system according to the first aspect or the second aspect, the monitoring target machine to which the monitoring device is attached is provided, and the higher-level device has a plurality of the monitoring. It may be configured to exchange the monitoring-related information with each of the monitoring devices attached to the target machine.

With this configuration, it is possible to provide a monitoring system in which settings suitable for the characteristics of the monitored machine are set for each monitoring device.

As the monitoring system according to the fourth aspect, in the monitoring system according to any one of the first to third aspects, the higher-level device is stored as a part of the unique information. May be configured to be optimized using a machine learning model based on the detection information collected from the monitoring device, and the optimized threshold value may be included in the reply information and transmitted to the monitoring device. ..

With this configuration, the threshold value is optimized using the machine learning model, so it is possible to set a more accurate threshold value.

As the monitoring system according to the fifth aspect, in the monitoring system according to any one of the first to fourth aspects, the monitored machine is a pump, a compressor, a turbine, a fan, a blower, and a refrigerator. , And one or more of the cooling towers.

With this configuration, it is possible to simplify the work of setting the threshold value in the monitoring device for various monitored machines.

The monitoring device according to the sixth aspect monitors the monitored machine, and stores the detection unit that detects the value of the monitored item of the monitored machine and the installation state information of the monitoring device. The state storage unit, the threshold storage unit that stores a part or all of the threshold value of the value of the monitoring target item that triggers a predetermined operation after the monitoring device is installed in the monitoring target machine, and the monitoring. It is provided with a communication unit that exchanges information with a higher-level device provided at a position away from the target machine.

With such a configuration, since the threshold storage unit is provided, it is possible to quickly detect when the threshold is exceeded, and it is possible to quickly cause a predetermined operation.

In the machine monitoring method according to the seventh aspect, the monitoring-related information sent from the monitoring device that detects the value of the monitored item of the monitored machine is specified by a higher-level device provided at a position away from the monitored machine. The monitoring-related information includes detection information regarding the value of the monitoring target item detected by the monitoring device and unique information, and the unique information is the monitoring device of the monitoring device. The collection process including the information on the installation state and the threshold value of the value of the monitoring target item that triggers a predetermined operation, and the unique monitoring-related information collected from the monitoring device by the higher-level device. The storage step of storing at least the unique information when the information is not stored, the installation state information of the unique information collected from the monitoring device by the higher-level device, and the stored installation state. The comparison step of comparing with the information of the above, the determination step of determining that the monitoring device has been replaced when the superior device has a difference as a result of the comparison in the comparison step, and the superior device , A portion of the threshold of the stored unique information that was not included in the unique information collected from the exchanged monitoring device when it was determined in the determination step that the monitoring device was replaced. A reply step of returning the reply information including at least the threshold value of the above to the monitoring device, and a storage update step of storing the threshold value of at least a portion of the threshold value received from the higher-level device by the monitoring device. , Equipped with.

According to the present disclosure, it is possible to simplify the work of setting the threshold value to the monitoring device, which tends to be relatively complicated when the monitoring device is replaced.

It is a schematic block diagram of the monitoring system which concerns on this embodiment. It is a schematic block diagram of the sensor and the higher-level equipment provided in the monitoring system which concerns on this embodiment. It is a flowchart explaining the procedure of resetting the threshold value to the exchanged sensor.

This application is based on Japanese Patent Application No. 2020-172501 filed on October 13, 2020 in Japan, the content of which forms part of the content of this application.
Also, the present invention will be more fully understood by the following detailed description. Further application of the present invention will be clarified by the following detailed description. However, detailed description and specific examples are preferred embodiments of the present invention and are provided only for purposes of explanation. From this detailed description, various changes and modifications will be apparent to those skilled in the art within the spirit and scope of the present invention.
The applicant has no intention of presenting any of the described embodiments to the public, and is equal to the disclosed modifications and alternatives that may not be literally included in the claims. It is a part of the invention under the argument.

Hereinafter, embodiments will be described with reference to the drawings. In each figure, members that are the same as or correspond to each other are designated by the same or similar reference numerals, and duplicated description will be omitted.

First, the monitoring system 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a schematic configuration diagram of the monitoring system 1. The monitoring system 1 is a system for monitoring the operating state of the pump 19 as a machine to be monitored. The monitoring system 1 is typically a system that aims to perform maintenance on a plurality of pumps 19 before a malfunction occurs by remotely monitoring one or a plurality of inspection items. .. The monitoring system 1 includes a sensor 10 attached to the pump 19 and a higher-level device 20.

The pump 19 to be monitored is installed in the management target area. The management target area is, for example, a place where a pump 19 in which a sensor 10 for acquiring a value (state amount) of a monitored item is installed is arranged, such as a factory or a machine room of an office building. FIG. 1 shows an example in which the pump 19A and the pump 19B each have a plurality of sensors 10. In the example shown in FIG. 1, the pump 19A has a sensor 10A attached to a motor, a sensor 10B attached to a gantry, and a sensor 10C attached to a bearing. The pump 19B has a sensor 10D attached to a bearing and a sensor 10E attached to the pump housing. Each of the

sensors

10A, 10B, 10C, 10D, and 10E is an independent sensor that detects a state quantity with respect to the attached portion, but is collectively referred to as "sensor 10" when explaining common properties. Similarly, the

pumps

19A and 19B each exhibit independent functions, but are collectively referred to as "pump 19" when explaining common properties. When mounting the sensor 10 in the above position, if the mounting part is a non-magnetic material or has a surface with a shape that does not match the mounting surface of the sensor 10, it is better to use an adhesive, and the sensor 10 can be attached or detached. From the viewpoint of facilitation, it is preferable to attach it with a magnet.

In the example shown in FIG. 1, the pump 19A has three

sensors

10A, 10B and 10C, and the pump 19B has two

sensors

10D and 10E. However, the number of each sensor 10 attached to the pump 19A and / or the pump 19B may be increased or decreased as necessary, and the number of pumps 19 may be increased or decreased as necessary. A mode in which the monitoring system 1 includes a plurality of sensors 10 is typically a case where a plurality of pumps 19 in which a plurality of sensors 10 are installed are provided in one unit. However, a plurality of pumps 19 in which one sensor 10 is installed may be provided in one unit. Alternatively, one pump 19 in which a plurality of sensors 10 are installed may be provided in one unit. Alternatively, a plurality of pumps 19 in which a plurality of sensors 10 are installed in one unit and a pump 19 in which one sensor 10 is installed in one unit may be provided in combination. Subsequently, each component of the monitoring system 1 will be described.

The sensor 10 detects the value (typically a physical quantity) of the monitored item of the pump 19, and corresponds to a monitoring device. The sensor 10 is configured to be able to detect the presence or absence of an abnormality in the monitored pump 19 by monitoring whether or not the value of the detected monitoring target item exceeds the threshold value. Further, the sensor 10 is configured to be able to communicate with the host device 20 and to exchange information (data) with the host device 20. The sensor 10 is typically configured to operate on power. The sensor 10 is typically configured to operate by receiving a portion of the electric power supplied to the pump 19 (usually the electric power from a commercial power source). However, a battery may be provided as an aid when the commercial power supply fails. Alternatively, it may be configured to operate only on a battery without using a commercial power source.

The schematic configuration of the sensor 10 in the present embodiment will be described with reference to the schematic configuration diagram of the sensor 10 and the higher-level device 20 shown in FIG. The sensor 10 includes a detection unit 11, an installation state storage unit 12, a threshold value storage unit 13, and a communication unit 14. The detection unit 11 detects the value (state amount) of the monitored item in the portion of the pump 19 to which the sensor 10 is attached. Examples of the monitoring target item detected by the detection unit 11 include vibration, temperature, pressure, current, voltage, and the like. Some sensors 10 are configured such that one sensor 10 detects a plurality of types of monitored items, while one sensor 10 is configured to detect one type of monitored item. There are also things. In this embodiment, the sensor 10A detects the current, the sensor 10B detects vibration, temperature, and leakage, the

sensors

10C and 10D are configured in the same manner as the sensor 10B, and the sensor 10E detects the pressure. It is configured.

The installation state storage unit 12 is a part that stores information on the installation state of the sensor 10. The installation state information includes a unique address that identifies the sensor 10. The unique address is an address assigned to each sensor 10 and is an address that can be distinguished from other sensors 10 other than the sensor 10. To give a specific example, the

sensors

10A, 10B, 10C, 10D, and 10E are assigned different unique addresses. In addition to the unique address, the installation status information includes one or more of the product unique address, model information, mounting position, GPS information, radio field strength, and other necessary information as necessary. ing. The product-specific address is an address that specifies the type of the sensor 10, and if the types are the same (typically the same product), the same address is assigned. That is, the same product-specific address may be assigned to a plurality of sensors 10. To give a specific example, the

sensors

10B, 10C, and 10D are all assigned the same product-specific address as a product for detecting vibration, etc., but the product-specific address is the sensor 10A or pressure, which is a product for electric current. It is different from the one assigned to the sensor 10E, which is a product for. The model information is information on the type of the machine to be monitored to which the sensor 10 is attached, and is a pump in the present embodiment. The mounting position includes the mounting location (where it is installed in the controlled area) and / or the mounting location (where it is installed in the pump 19). The mounting position information may be estimated from GPS information. The radio wave strength is information on the radio wave strength when the sensor 10 communicates with the host device 20 or communicates with a mobile terminal device (smartphone or the like) for reference by a patrol observer. Typically, the unique address and the product unique address are stored at the time of manufacture of the sensor 10. Model information, mounting position, GPS information, signal strength, and other necessary information are usually ex post facto (after the sensor 10 is manufactured, typically after being installed in the desired position) as needed. It will be remembered. This kind of information stored after the fact can be typically erased by an administrator's command (such as an instruction by input via a device).

The threshold value storage unit 13 is a portion that stores the threshold value of the value of the monitored item of the pump 19. The threshold value is used to determine the state of the pump 19 which is a monitored machine, and is a value of a monitored item that triggers a predetermined operation in relation to the pump 19. The predetermined operation is typically an alarm, but may be a change in operating conditions such as deceleration of the pump 19. The threshold value is set for each monitored item. Therefore, one sensor 10 may be set with one threshold value, and one sensor may be set with a plurality of threshold values. Further, even when the same type of sensor 10 is attached to a plurality of pumps 19 of the same model, the threshold setting may differ depending on the installation environment and operating conditions of the pump 19. That is, the set threshold value is a value peculiar to each sensor 10. The threshold value set in this way is stored in the threshold value storage unit 13. The threshold value stored in the threshold value storage unit 13 can be typically erased by an administrator's command (instruction by input via a device, etc.). At the time of initial setting, the threshold value may be determined with a relatively large margin in consideration of the characteristics of the items to be monitored. After that, it may be updated (updated) as appropriate according to the operational status.

The communication unit 14 is a part having parts necessary for wireless communication with the host device 20 such as an antenna. The communication unit 14 is configured to be able to exchange data with each of the detection unit 11, the installation state storage unit 12, and the threshold value storage unit 13. The communication unit 14 is configured to receive data to be transmitted to the host device 20 from the detection unit 11, the installation state storage unit 12, and the threshold value storage unit 13. Also. The communication unit 14 is configured to be able to transfer the data received from the host device 20 to the installation state storage unit 12 and / or the threshold value storage unit 13. Here, the information (data) transmitted from the sensor 10 to the host device 20 is collectively referred to as monitoring-related information. Monitoring-related information includes detection information and unique information. The detection information is information regarding the value of the monitored item detected by the detection unit 11. The unique information includes the installation state information of the sensor 10 stored in the installation state storage unit 12 and the threshold value stored in the threshold value storage unit 13.

As described above, the sensor 10 includes a detection unit 11, an installation state storage unit 12, a threshold value storage unit 13, and a communication unit 14, and in FIG. 2, for convenience of explanation, these are from the viewpoint of function. It is shown separately. However, these

parts

11, 12, 13, and 14 may be integrally configured as a part of the sensor 10. Further, although the detection unit 11, the installation state storage unit 12, the threshold value storage unit 13, and the communication unit 14 are shown in FIG. 2 to be arranged close to each other, among these units, One or a plurality of parts may be physically separated from each other.

The host device 20 is a device that collects monitoring-related information sent from the sensor 10. The host device 20 is provided at a position away from the pump 19 to which the sensor 10 is attached. Typically, the host device 20 is provided outside the controlled area in which the pump 19 is installed. The host device 20 may be composed of a single device or may be composed of a plurality of devices connected by a network, depending on the situation. Specific examples of what constitutes the host device 20 include a repeater such as a gateway (GateWay), a server (computer) existing in the same local network as the sensor 10, and a server (including the cloud) connected via the Internet or a public line. Can be mentioned. The repeater may be connected to an edge unit. In addition, a smartphone, a tablet-type mobile terminal, a laptop (notebook computer), or the like may also constitute a part or all of the higher-level device 20. As shown in FIG. 2, the host device 20 includes a communication unit 21, a storage unit 22, a determination unit 23, and an optimization unit 24. In FIG. 2, for convenience of explanation, these

parts

21, 22, 23, and 24 are shown separately from the viewpoint of function, but they may be integrally configured as a part of the higher-level device 20. Alternatively, one or more of these

parts

21, 22, 23, 24 may be physically separated and provided at distant locations.

The communication unit 21 is a part having parts necessary for wireless communication with the sensor 10, such as an antenna. The communication unit 21 may have parts necessary for performing wireless communication or wired communication with an external device (for example, a mobile terminal for mere status reference) that does not constitute the host device 20. The communication unit 21 may pass the monitoring-related information received from the sensor 10 to a necessary part in the upper device 20 and receive the data transmitted (replied) to the sensor 10 from the necessary part in the upper device 20. It is configured to be able to. The communication unit 21 is configured to receive monitoring-related information from the sensor 10 at a predetermined timing. The predetermined timing may be periodic (for example, a predetermined interval every few seconds or minutes) or may be continuous. When the communication unit 21 receives the monitoring-related information from the sensor 10 at a predetermined timing, the host device 20 can collect the monitoring-related information from the sensor 10. The data returned from the host device 20 to the sensor 10 includes reply information. The reply information may include a threshold.

The storage unit 22 is a part that stores unique information among the monitoring-related information received from the sensor 10. The storage unit 22 is configured to store unique information for each sensor 10 when the host device 20 communicates with a plurality of sensors 10. Therefore, in the present embodiment, the storage unit 22 separately stores the unique information of the sensor 10A, the unique information of the sensor 10B, the unique information of the sensor 10C, the unique information of the sensor 10D, and the unique information of the sensor 10E. .. The unique information stored in the storage unit 22 relates to the sensor 10 that is permitted (authenticated) to communicate with the host device 20. The authentication between the host device 20 and the sensor 10 may be performed by, for example, a mobile terminal possessed by a watchman who can enter the managed area by detecting the radio wave strength when communicating with each other. The storage unit 22 can erase the stored information partially (for example, for each sensor) or collectively by an administrator's command (instruction by input via a device, etc.). It has become.

The determination unit 23 collates the installation status information among the unique information received from the sensor 10 with the installation status information stored in the storage unit 22, and determines whether or not the sensor 10 has been replaced. Is. The determination unit 23 compares the installation state information received from the sensor 10 with the installation state information stored in the storage unit 22, and determines that the sensor 10 has been replaced when there is a difference. It is supposed to be. In particular, when the two are compared and the unique addresses are different, it can be determined that the sensor 10 has been replaced. When the sensor 10 is replaced, the threshold value is often missing (typically, the threshold value is not set), and in this respect, there is a difference in the unique information such as the presence or absence of the threshold value. Become. A part of the threshold value of the replaced sensor 10 may be stored in the threshold value storage unit 13 in advance before being attached to the pump 19. In addition, when comparing the two, if there is no difference in the unique address but other information on the installation status has changed, for example, if there is a difference in GPS information, mounting position, etc., the sensor 10 is relocated and is different. It can be judged that it will be used in the place of. When it is determined that the sensor 10 has been relocated, as described above, in view of the fact that the set threshold value becomes a peculiar value according to the installation environment, operating conditions, etc., the same as when the sensor 10 is newly installed. I will handle it. That is, when the sensor 10 is relocated (including the case where it is relocated together with the pump 19), it is not included when the sensor 10 is replaced. The handling when the sensor 10 is relocated will be described later.

The optimization unit 24 is a part for optimizing the threshold value stored in the storage unit 22. The optimization unit 24 is implemented with a program that can execute a machine learning model. The optimization unit 24 is configured to be able to perform machine learning on the data of the monitoring target items collected from the plurality of sensors 10 to derive a more accurate threshold value. The optimization unit 24 may be arranged in the local network, or may be arranged on the cloud. When the optimization unit 24 is arranged on the cloud, it becomes easy to use the machine learning model updated in a timely manner. When using a machine learning model, the threshold value may not be sufficiently accurate until the data of the monitored items are collected to a certain extent (for example, to the extent that the data pattern and relevance can be estimated for the time being). In consideration of this point, the optimization unit 24 does not perform optimization using the machine learning model at the time of initial setting of the threshold value, and optimizes using the machine learning model after collecting a certain amount of data of the items to be monitored. Is configured to do.

As described above, the sensor 10 and the host device 20 configured as described above are configured to enable wireless communication with each other. As the means of wireless communication, an international standard communication means is typically used. International standard communication means such as IEEE802.154, IEEE802.5.1, IEEE802.15.11a, 11b, 11g, 11n, 11ac, 11ad, ISO / IEC14513-3-10, IEEE802.154g, etc. There is a method. Further, Bluetooth (registered trademark), BluetoothLowEnergy, Wi-Fi, ZigBee (registered trademark), Sub-GHz, EnOcean (registered trademark) and the like can also be used.

When constructing the monitoring system 1, the sensor 10 is attached to the pump 19 newly installed in the management target area and / or to the pump 19 originally installed in the management target area. The sensor 10 attaches a necessary number to a place where the monitored item of the pump 19 can be detected. The sensor 10 newly attached to the pump 19 usually stores in advance a unique address and a product-specific address, which are information about the sensor 10 itself. However, the new sensor 10 usually does not store model information, mounting position, GPS information, radio field strength, threshold value, etc., which are not clear at the time of manufacture. These unstored information can be stored in the sensor 10 by inputting from a tablet-type mobile terminal or the like whose connection with the sensor 10 is authenticated and transferring the information to the sensor 10. Further, when the sensor 10 is relocated, the administrator typically stores the type of information (model information, mounting position, GPS information, radio wave strength) stored in the installation state storage unit 12 after the fact. Etc.), the threshold stored in the threshold storage unit 13, and the unique information of the sensor 10 stored in the storage unit 22 are erased. In particular, by erasing the unique information of the sensor 10 stored in the storage unit 22, the information is compared in the determination unit 23, and although there is no difference in the unique address, other information on the installation state is changed. In principle, there will be no cases where it is judged to be present. After erasing this information, the administrator can use the information and threshold of the type to be stored after the fact, as in the case of newly installing the sensor 10, to the tablet-type mobile terminal whose connection with the sensor 10 is authenticated. It can be input / transferred from the sensor 10 and stored in the sensor 10.

In the monitoring system 1, when the pump 19 which is the monitoring target machine is operating, the sensor 10 detects the value of the monitoring target item. The sensor 10 transmits the detected value of the monitored item together with other information as monitoring-related information to the host device 20 at a predetermined timing. The value of the monitored item transmitted to the host device 20 is used as basic information of the machine learning model in the optimization unit 24. Further, the sensor 10 compares the detected value of the monitored item with the threshold value stored in the threshold value storage unit 13. If the value of the detected monitored item does not exceed the threshold value, the sensor 10 does not cause a predetermined operation. If the value of the monitored item does not exceed the threshold value, it is estimated that there is no problem with the pump 19, and the normal operation of the pump 19 is continued. On the other hand, when the value of the monitored item exceeds the threshold value, the sensor 10 presumes that an abnormality has occurred in the pump 19 and issues an alarm (causes a predetermined operation). The alarm is typically issued by generating an alarm signal with the sensor 10 and notifying the device monitored by the observer via the host device 20. The observer who recognizes the alarm can take measures such as inspecting the pump 19 when the abnormality of the pump 19 is recognized, and the pump 19 which has a higher possibility of failure than the other pumps 19 fails. It will be possible to perform maintenance before doing so. In the monitoring system 1 according to the present embodiment, since the sensor 10 determines whether or not the value of the detected monitored item exceeds the threshold value, a time lag occurs as compared with the determination by a remote computer. Can be suppressed, and if an abnormality occurs, it can be dealt with promptly.

In the monitoring system 1 operating as described above, since the sensor 10 usually has a shorter life than the pump 19, the sensor 10 may be replaced before the pump 19. When the sensor 10 is replaced, the threshold value is reset as well as the model information, the mounting position information, and the like. As described above, since the set threshold value is a value peculiar to each sensor 10 according to the installation environment and the operating condition, the threshold value cannot be set uniformly, and the sensor 10 possessed by the monitoring system 1 cannot be set uniformly. The larger the number, the more complicated the threshold setting work. Further, as described above, when the number of threshold values is large, it takes time and effort to manually reset the threshold values. Further, if the observer monitoring the monitoring system 1 and the replacement worker who replaces the sensor 10 are different, the supervisor replaces the sensor 10 and then resets the sensor. The period during which 10 interrupts monitoring becomes long. In the monitoring system 1 according to the present embodiment, the following operations are performed in order to save labor in resetting the threshold value after replacing the sensor 10 and to shorten the monitoring interruption period of the sensor 10 to be replaced as much as possible. It is supposed to be.

FIG. 3 is a flowchart illustrating a procedure for resetting the threshold value for the replaced sensor 10. In the following description, when the configuration of the monitoring system 1 is referred to, FIGS. 1 and 2 will be referred to as appropriate. In the monitoring system 1, as described above, the host device 20 normally collects monitoring-related information from each sensor 10 at a predetermined timing (collection step: S1). After collecting the monitoring-related information, the host device 20 determines whether or not there is an item that is not stored in the storage unit 22 regarding the unique information among the collected monitoring-related information (S2). If there is an item that has not been saved in the storage unit 22, the unsaved item is stored in the storage unit 22 (preservation step: S3). After that, the process returns to the step (S1) in which the host device 20 collects monitoring-related information.

On the other hand, in the step (S2) of determining whether or not there is an item that is not saved in the storage unit 22 in the unique information collected from the sensor 10, if there is no item that is not saved, the collected installation state information is used. The information of the installation state stored in the storage unit 22 is compared (comparison step: S4). After comparing the collected installation state information with the installation state information stored in the storage unit 22, it is determined whether or not there is a difference (S5). If there is no difference between the two, the process returns to the step (S1) in which the host device 20 collects monitoring-related information. On the other hand, if there is a difference between the two, it is determined that the sensor 10 having the difference has been replaced (determination step: YES in S5). If it is determined that the sensor 10 has been replaced, the host device 20 returns the reply information to the sensor 10 (reply step: S6). The reply information includes a threshold value stored in the storage unit 22 and not included in the unique information collected from the sensor 10. Further, if the unique information collected from the sensor 10 includes information that is not included in addition to the threshold value, such as model information and mounting position information, the information that is not included may be included in the reply information. ..

When the sensor 10 receives the reply information from the host device 20, it stores at least a threshold value that is not stored in the threshold value storage unit 13 among the threshold values included in the reply information (memory update step: S7). In this storage update step, if the reply information received from the host device 20 includes unique information other than the threshold value, it is preferable to store the installation state information that is not stored in the installation state storage unit 12. In this way, when the sensor 10 is replaced, the information not stored in the replaced sensor 10 can be automatically supplemented from the information stored in the host device 20, which is relatively complicated. It is possible to easily reset the threshold value and the like, which tend to be common. Further, even if the observer and the exchange worker are different, the threshold value and the like are automatically reset, so that the interruption period of monitoring by the exchanged sensor 10 can be minimized. After storing the insufficient information in the exchanged sensor 10, it is determined whether or not there is a command to end the monitoring of the monitored item by the monitoring system 1 (S8). If it is not completed, the host device 20 returns to the step (S1) of collecting monitoring-related information, and thereafter, the above-mentioned step is repeated. On the other hand, if there is a command to end the monitoring, the monitoring will be terminated.

In the comparison step (S4) in the above flow, not only the installation state information collected from the sensor 10 and the installation state information stored in the storage unit 22 but also the unique information including the threshold value is compared. It may be that. As a result of comparison, as a case where the two threshold values are different, there is a case where all or a part of the threshold value in the unique information collected from the sensor 10 is missing, and there is no missing threshold value, but the storage unit 22. It may be different from the threshold value stored in. In this case, the threshold value stored in the storage unit 22 may be updated by the calculation using the machine learning model in the optimization unit 24. By including the threshold value optimized by the optimization unit 24 in the reply information and transmitting it to the sensor 10, the threshold value stored in the threshold value storage unit 13 of the sensor 10 can be updated to the optimized one. A more accurate threshold can be set. Further, in the determination step (S5) in the above flow, when it is determined that the sensor 10 has been relocated due to differences in other installation status information (including lack of information) although there is no difference in the unique address. , It is recommended to configure it to issue an alarm. If the sensor 10 is properly relocated, it is not judged that the sensor 10 has been relocated in principle, but if the information about the sensor 10 in the storage unit 22 has not been erased, the sensor is not erased. It may be determined that 10 has been relocated. In order to deal with such a case, when it is determined that the sensor 10 has been relocated, an alarm is issued to call the attention of the observer and prompt the appropriate setting (setting similar to the initial setting). good. As described above, since the life of the sensor 10 is generally shorter than the life of the pump 19, the sensor 10 is often replaced without replacing the pump 19. However, if the sensor 10 is replaced shortly before the pump 19 needs to be replaced, the pump 19 may be replaced but the sensor 10 may continue to be used. At this time, if the specifications (flow rate, pressure, etc.) do not change between the newly installed pump 19 and the removed pump 19, the unique information stored in the sensor 10 to be continuously used and the storage unit 22 of the host device 20 are stored. It goes without saying that it is not necessary to erase the information that has been stored.

As described above, according to the monitoring system 1 according to the present embodiment, when the sensor 10 is replaced, the information stored in the host device 20 in advance can be set in the new sensor 10. , The resetting work can be simplified.

In the above description, the machine to be monitored is assumed to be the pump 19, but in addition to the pump, it may be a compressor, a turbine, a fan, a blower, a refrigerator, a cooling tower, or the like, or any combination thereof. There may be. When the machine to be monitored is a rotating machine as described above, vibration may be adopted as one of the items to be monitored. The monitored machine may correspond to various machines having a monitored item.

In the above description, it is assumed that the host device 20 has the optimization unit 24, but if the threshold value is not optimized using the machine learning model, the optimization unit 24 can be omitted.

All documents, including publications, patent applications and patents cited herein, are individually specifically shown, referenced and incorporated, and all of their content is described herein. To the same extent, refer to and incorporate here.

The use of nouns and similar demonstratives used in connection with the description of the invention (particularly in connection with the following claims) is not particularly pointed out herein or clearly inconsistent with the context. , Singular and plural. The phrases "prepare," "have," "include," and "include" are to be interpreted as open-ended terms (ie, meaning "including, but not limited to," unless otherwise noted). The description of the numerical range herein is intended solely to serve as an abbreviation for individually referring to each value within that range, unless otherwise noted herein. Each value is incorporated herein as if it were individually listed herein. All methods described herein can be performed in any suitable order, as long as they are not specifically pointed out herein or are clearly inconsistent with the context. All examples or exemplary phrases used herein (eg, "etc.") are intended solely to better illustrate the invention and set limits to the scope of the invention, unless otherwise stated. is not. Nothing in the specification shall be construed as indicating an element not described in the claims as essential to the practice of the present invention.

In the present specification, preferred embodiments of the present invention are described, including the best embodiments known to the inventor for carrying out the present invention. For those skilled in the art, reading the above description will reveal variations of these preferred embodiments. The inventor anticipates that an expert will apply such modifications as appropriate, and intends to implement the invention in a manner other than that specifically described herein. .. Accordingly, the invention includes all amendments and equivalents of the content of the claims attached herein, as permitted by applicable law. Moreover, any combination of the above elements in all modifications is included in the invention unless specifically pointed out herein or in obvious context.

Claims

Unique information including information on the installation status of the monitoring device and a threshold value of the value of the monitoring target item that triggers a predetermined operation, which is a monitoring device that detects the value of the monitoring target item of the monitoring target machine. With a monitoring device that can store
It is a higher-level device that collects monitoring-related information including the unique information and the detection information regarding the value of the monitoring target item detected by the monitoring device from the monitoring device, and is located at a position away from the monitored machine. Equipped with the provided high-end equipment,
The higher-level equipment is
The monitoring-related information is collected from the monitoring device at a predetermined timing, and the monitoring-related information is collected at a predetermined timing.
When the unique information is not saved among the monitoring-related information collected from the monitoring device, at least the unique information is saved.
Among the unique information collected from the monitoring device, the installation state information and the stored installation state information are compared, and if there is a difference, it is determined that the monitoring device has been replaced. ,
When it is determined that the monitoring device has been replaced, at least the threshold value of the portion of the stored threshold value of the unique information that is not included in the unique information collected from the exchanged monitoring device is included. The reply information is configured to be sent to the monitoring device.
The monitoring device is configured to store at least a threshold value of a portion of the threshold value received from the higher-level device that is not stored.
Monitoring system.
Equipped with multiple monitoring devices
The host device is configured to store the unique information, determine whether or not the monitoring device has been exchanged, and transmit the reply information to the monitoring device individually for each of the monitoring devices. Has been,
The monitoring system according to claim 1.
A plurality of machines to be monitored to which the monitoring device is attached are provided.
The host device is configured to exchange monitoring-related information with each of the monitoring devices attached to the plurality of monitored machines.
The monitoring system according to claim 1 or 2.
The higher-level device optimizes the threshold value stored as a part of the unique information by using a machine learning model based on the detection information collected from the monitoring device, and returns the optimized threshold value. It is configured to be included in the information and transmitted to the monitoring device.
The monitoring system according to any one of claims 1 to 3.
The monitored machine is one or more of a pump, a compressor, a turbine, a fan, a blower, a refrigerator, and a cooling tower.
The monitoring system according to any one of claims 1 to 4.
It is a monitoring device that monitors the monitored machine.
A detection unit that detects the value of the monitored item of the monitored machine,
An installation state storage unit that stores information on the installation state of the monitoring device, and
A threshold storage unit that stores a part or all of the threshold value of the value of the monitored item that triggers a predetermined operation after the monitoring device is installed in the monitored machine.
A communication unit that exchanges information with a higher-level device provided at a position away from the monitored machine is provided.
Monitoring device.
This is a collection process in which monitoring-related information sent from a monitoring device that detects the value of a monitored item of a monitored machine is collected at a predetermined timing by a higher-level device installed at a position away from the monitored machine.
The monitoring-related information includes detection information regarding the value of the monitoring target item detected by the monitoring device and unique information.
The unique information includes a collection process including information on the installation state of the monitoring device and a threshold value of the value of the monitoring target item that triggers a predetermined operation.
A storage step of storing at least the unique information when the higher-level device does not store the unique information among the monitoring-related information collected from the monitoring device.
A comparison step in which the higher-level device compares the information on the installation state among the unique information collected from the monitoring device with the stored information on the installation state.
As a result of the comparison in the comparison step, the higher-level device determines that the monitoring device has been replaced when there is a difference, and a determination step.
When the host device determines that the monitoring device has been replaced in the determination step, it is included in the unique information collected from the exchanged monitoring device among the threshold values of the stored unique information. In the reply process of returning the reply information including at least the threshold value of the portion that was not used to the monitoring device,
The monitoring device includes a storage update step of storing at least a threshold value of a portion of the threshold value received from the higher-level device that is not stored.
Machine monitoring method.