State quantity monitoring system and operating method thereof

Abstract

To provide a state quantity monitoring system capable of reducing the power consumption of a battery-driven wireless sensor.SOLUTION: A state quantity monitoring system for monitoring the state quantities of a plurality of instruments placed at a plant includes: a wireless sensor which is provided for each of the plurality of instruments, and which is configured to sense a first state quantity of such an instrument; a managing device that is configured to be able to output, for each of a plurality of wireless sensors, a sensing plan that is information including at least one of a clock time, a cycle and a time period for sensing the first state quantity of the instrument by the wireless sensor; and a portable terminal that is configured to obtain, from the managing device, the sensing plan for each of the plurality of wireless sensors, and to transmit the sensing plan for each wireless sensor to the wireless sensor corresponding to the sensing plan.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a state quantity monitoring system and an operation method thereof. [Background technology]

[0002] In plants such as thermal power plants, the status of equipment may be monitored and abnormalities may be detected based on information from various sensors (e.g., sensors that measure vibration, temperature, pressure, flow rate, etc.) attached to equipment in the plant. For example, Patent Document 1 discloses a measurement system that can inexpensively and reliably measure shaft vibration of equipment that operates intermittently in a plant. This system includes a plurality of ultrasonic sensors installed in each of a plurality of intermittently operating equipment, and a switch that selectively connects one of the ultrasonic sensors to an ultrasonic transmitting / receiving device, and based on the generation of a start signal for the intermittently operating equipment, this switch connects the ultrasonic transmitting / receiving device to the ultrasonic sensor installed in the intermittently operating equipment to which the start signal was sent. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4761930 Summary of the Invention [Problem to be solved by the invention]

[0004] The inventors of the present application are considering installing battery-powered wireless sensors in devices installed in locations in a plant where it is difficult to lay additional power cables for economic reasons, etc., and using the wireless sensors to measure the state quantities of the devices. If the remaining battery power of the wireless sensors becomes excessively low, there is a concern that the wireless sensors will not be able to properly measure the state quantities of the devices, so it is important to reduce the power consumption of the wireless sensors.

[0005] In this regard, the system described in Patent Document 1 is configured so that the sensor operates using a startup current to start up the equipment, and Patent Document 1 does not disclose any knowledge on reducing the power consumption of battery-powered wireless sensors.

[0006] In view of the above-mentioned circumstances, at least one embodiment of the present disclosure aims to provide a status quantity monitoring system that measures the status quantities of plant equipment using a battery-powered wireless sensor, and an operation method thereof, which is capable of reducing the power consumption of the wireless sensor. [Means for solving the problem]

[0007] In order to achieve the above object, a state quantity monitoring system according to at least one embodiment of the present disclosure includes: A state quantity monitoring system for monitoring state quantities of a plurality of devices arranged in a plant, comprising: a battery-powered wireless sensor provided in each of the plurality of devices and configured to sense a first state quantity of the device; a management device configured to be capable of outputting, for each of the plurality of wireless sensors, a sensing plan, which is information including at least one of a time, a cycle, and a period for sensing a first state quantity of the device by the wireless sensor; a mobile terminal configured to acquire the sensing plan for each of the plurality of wireless sensors from the management device and transmit the sensing plan for each of the wireless sensors to the wireless sensor corresponding to the sensing plan; Equipped with. Effect of the Invention

[0008] According to at least one embodiment of the present disclosure, there is provided a state quantity monitoring system that measures the state quantities of plant equipment using a battery-powered wireless sensor, and an operation method thereof that can reduce the power consumption of the wireless sensor. [Brief description of the drawings]

[0009] [Figure 1] 1 is a diagram showing an example of an overall configuration of a state quantity monitoring system 2 according to an embodiment of the present disclosure. [Diagram 2] 13 is a flowchart showing an example of a method for formulating a sensing plan using the management device 8. [Diagram 3] FIG. 13 is a diagram showing an example of a sensing plan before optimization. [Figure 4] FIG. 13 is a diagram showing an example of an optimized sensing plan. [Diagram 5] 2 is a flowchart showing an example of a method for changing a sensing plan of a wireless sensor 6 as an example of a method for operating the state quantity monitoring system 2 shown in FIG. [Figure 6] FIG. 11 is a diagram showing an example of a sensing plan before a change in the operation plan of a plurality of devices 4 (devices A to C). [Figure 7] 1 shows an example of a sensing plan after the operation plans of a plurality of devices 4 (devices A to C) are changed. [Figure 8] 13 is a flowchart showing an example of a method for changing a sensing plan in response to a change in the failure risk of a target device 4, as an example of a method for operating a state quantity monitoring system 2. [Figure 9] 11 is a diagram showing an example of a relationship between factors of change in a failure risk of a target device 4, an increase / decrease in the failure risk, and a sensing period. FIG. [Figure 10] 2 is a diagram showing another example of the overall configuration of the state quantity monitoring system 2 according to an embodiment. FIG. [Figure 11] 11A and 11B are diagrams for explaining the difference in sensing period between a transient state and a steady state. [Figure 12] 2 is a diagram showing another example of the overall configuration of the state quantity monitoring system 2 according to an embodiment. FIG. [Figure 13] 13 is a flowchart showing another example of a method for changing a sensing plan of the wireless sensor 6 as an example of a method for operating the state quantity monitoring system 2 shown in FIG. [Figure 14] 13 is a diagram showing the relationship between the time change of the state quantity of the device 4 and the first and second threshold values. FIG. [Figure 15]1. FIG. 4 is a diagram showing another example of a method for changing the sensing plan of the wireless sensor 6 as an example of a method for operating the state quantity monitoring system 2 shown in FIG. [Figure 16] 2 is a diagram showing another example of the overall configuration of the state quantity monitoring system 2 according to an embodiment. FIG. [Figure 17] 10 is a flowchart for explaining how to use the sensor 9 and the wireless sensor 6. [Figure 18] 13 is a diagram showing the relationship between the time change of a second state quantity and a third threshold value, etc. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, some embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as the embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the invention. For example, expressions expressing relative or absolute configuration, such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial," not only express such a configuration strictly, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained. For example, expressions indicating that things are in an equal state, such as "identical," "equal," and "homogeneous," not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained. For example, expressions describing shapes such as a rectangular shape or a cylindrical shape do not only refer to rectangular shapes, cylindrical shapes, etc. in the strict geometric sense, but also refer to shapes that include uneven portions, chamfered portions, etc., to the extent that the same effect is obtained. On the other hand, the expressions "comprise," "include," "have," "includes," or "have" of one element are not exclusive expressions excluding the presence of other elements.

[0011] 1 is a diagram illustrating an example of an overall configuration of a state quantity monitoring system 2 according to an embodiment of the present disclosure. The state quantity monitoring system 2 is a system that monitors state quantities of a plurality of devices 4 arranged in a plant 100.

[0012] As shown in FIG. 1, a status quantity monitoring system 2 includes a plurality of devices 4, a plurality of wireless sensors 6, a management device 8, and a mobile terminal 10.

[0013] Each of the multiple devices 4 may be the same type of device that performs intermittent operation and may be a device that is redundantly designed to operate during different periods. Each of the multiple devices 4 may be, for example, a rotating machine such as a pump, but the type of the devices 4 is not particularly limited.

[0014] Each of the wireless sensors 6 is a battery-powered wireless sensor having a built-in battery 12. In the exemplary embodiment shown in FIG. 1, each of the wireless sensors 6 includes a battery 12, a sensor unit 14, and an MCU 16 (Micro The wireless sensor 6 includes a controller unit (SRAM), a storage unit 18 (storage device), a switch 19, and a data communication unit 20 (input / output device). A wireless sensor 6 is provided for each device 4, and each wireless sensor 6 has the same configuration.

[0015] The sensor unit 14 senses a state quantity (for example, temperature, pressure, vibration, image, meter indication value or meter display value, etc. of the device 4) in which the wireless sensor 6 including the sensor unit 14 is provided. That is, the sensor unit 14 may be a temperature sensor that senses the temperature of the device 4, a pressure sensor that senses the pressure of the device 4, a vibration sensor that senses the vibration of the device 4, an image sensor that senses an image of the device 4, a sensor that senses the meter indication value or meter display value of the device 4, or the like.

[0016] The MCU 16 controls the sensor unit 14 so as to sense a state quantity (first state quantity) of the device 4 based on a sensing plan stored in the storage unit 18, which will be described later.

[0017] The storage unit 18 may be, for example, a memory such as a flash memory or a RAM (Random Access Memory). The storage unit 18 stores a sensing plan, which is a plan for sensing the state quantity of the device 4 by the wireless sensor 6, for the device 4 provided with the wireless sensor 6 including the storage unit 18. The sensing plan stored in the storage unit 18 is information including a time (sensing time) at which the state quantity of the device 4 is sensed by the wireless sensor 6, a cycle (sensing cycle) at which the state quantity of the device 4 is sensed by the wireless sensor 6, and a period (sensing period) at which the state quantity of the device 4 is sensed by the wireless sensor 6. Here, it is desirable to set the sensing cycle and the sensing period according to the purpose, but the sensing cycle may be, for example, every second, every minute, every 10 minutes, or every hour, and the sensing period may be, for example, every second, every 10 seconds, or every 30 seconds. The storage unit 18 also stores data on the state quantity of the device 4 sensed by the wireless sensor 6.

[0018] The wireless sensor 6 is configured to be able to operate in a standby mode, a sleep mode, and a deep sleep mode in addition to a mode for sensing the state quantity of the device 4.

[0019] The standby mode is a mode in which sensing of the state quantities of the device 4 is not performed, a beacon signal is transmitted to notify the mobile terminal 10 of the presence of the wireless sensor 6, and a state in which a signal can be received from the mobile terminal 10 is periodically repeated. The standby mode is executed to reduce power consumption of the MCU 16 and the data communication unit 20 during a period in which sensing of the state quantities of the device 4 is not performed in the sensing plan.

[0020] The sleep mode is a mode in which the device 4 does not sense or transmit signals, and only receives signals of information indicating the sensing plan. The sleep mode is one of the modes executed during a period in which there is no need for sensing the device 4 throughout the period, such as a period in which the device 4 stops operating, but the sensing plan may be changed.

[0021] The deep sleep mode is a mode in which no sensing is performed or no signal transmission or reception is performed by the device 4. The deep sleep mode is one of the modes executed during a period in which there is no need to sense the device 4 and there is little possibility of changing the sensing plan, such as a period in which the device 4 is not operating.

[0022] Switch 19 is a switch for switching between a sleep mode and a deep sleep mode, and an operator of plant 100 or the like can operate switch 19 to switch the mode of wireless sensor 6 between the sleep mode and the deep sleep mode.

[0023] The data communication unit 20 is configured to be able to perform wireless communication with the mobile terminal 10. For example, BLE (Bluetooth Low Energy) or LPWA (Low Power Assistance) may be used for wireless communication between the data communication unit 20 and the mobile terminal 10. Alternatively, a power-saving wireless communication technique such as a power wide area wireless communication (PWW) may be used. The wireless sensor 6 is capable of receiving information indicating a sensing plan from the mobile terminal 10 via a data communication unit 20, and is capable of transmitting data on the state quantities of the device 4 stored in the storage unit 18 to the mobile terminal 10 via the data communication unit 20. The data on the state quantities of the device 4 transmitted from the wireless sensor 6 to the mobile terminal 10 is transmitted from the mobile terminal 10 to the management device 8, and is thereby stored in a storage unit 24 of the management device 8.

[0024] The management device 8 is configured to set and output the sensing plan for each of the multiple wireless sensors 6. In the exemplary embodiment shown in FIG. 1, the management device 8 includes a CPU 22, a storage unit 24, a GUI (Graphical User Interface) 26, and a data communication unit 28 (input / output device). As shown in S101 of FIG. 2, an operator of the plant 100 sets a sensing plan for each of the multiple wireless sensors 6 on the GUI 26 based on information indicating the operation plans of the multiple devices 4 of the plant 100 stored in the storage unit 24 of the management device 8 (see FIGS. 3 and 4). In FIG. 3, the sensing plan is set regardless of the operation period of each of the multiple devices 4 (devices A, B, and C), whereas in the example shown in FIG. 4, the sensing plan is set (optimized) so that the wireless sensor 6 corresponding to each device 4 senses the device 4 according to the operation period of each device 4. As shown in S102 of FIG. 2, the management device 8 stores the sensing plan set for each wireless sensor 6 (for each device 4) on the GUI 26 in the storage unit 24.

[0025] The sensing plan for each of the multiple wireless sensors 6 set in the management device 8 (the sensing plan for each of the multiple wireless sensors 6 stored in the memory unit 24) is transmitted to the mobile terminal 10 via wired communication or wireless communication via the data communication unit 28.

[0026] The mobile terminal 10 is a portable mobile terminal such as a tablet terminal or a smartphone. The mobile terminal 10 acquires a sensing plan for each of the multiple wireless sensors 6 set by the management device 8 via the data communication unit 28 of the management device 8. When an operator of the plant 100 carries the mobile terminal 10 and moves within the plant 100 to approach each of the multiple devices 4, the sensing plan for each of the multiple wireless sensors 6 acquired by the mobile terminal 10 is transmitted from the mobile terminal 10 to the wireless sensor 6 corresponding to each sensing plan.

[0027] According to the above-mentioned state quantity monitoring system 2, data on state quantities of each device 4 sensed by each of the plurality of wireless sensors 6 is transmitted to the management device 8 via the mobile terminal 10, and a sensing plan for each of the plurality of wireless sensors 6 output from the management device 8 is transmitted to the wireless sensor 6 corresponding to each sensing plan via the mobile terminal 10. Therefore, when an operator of the plant carrying the mobile terminal 10 moves to a position close to the wireless sensor 6, it becomes possible to realize transmission of the sensing plan from the mobile terminal 10 to the wireless sensor 6 and transmission of state quantity data of each device from the wireless sensor 6 to the mobile terminal 10 by a power-saving communication means (for example, the above-mentioned BLE or LPWA, etc.), and it is possible to reduce the power required for communication between the mobile terminal 10 and the wireless sensor 6. Therefore, in the state quantity monitoring system 2 that measures the state quantities of the devices 4 of the plant 100 using the battery-powered wireless sensor 6, it is possible to reduce the power consumption of the wireless sensor 6.

[0028] FIG. 5 is a diagram showing an example of a flow for changing the sensing plan of the wireless sensor 6 in the state quantity monitoring system 2 shown in FIG. For example, in the state quantity monitoring system 2, if it becomes necessary to change the sensing plan of the wireless sensor 6 due to a failure of a target device 4 which is any one of the multiple devices 4, a failure of an associated device related to the target device 4, or a change in the operation plan of the multiple devices 4 due to a change in the operation plan of the plant 100, the sensing plan may be changed in accordance with the flow shown in Figure 5.

[0029] In S201 shown in FIG. 5, the operator of the plant 100 sets a sensing plan for each of the multiple wireless sensors 6 on the GUI 26 based on information indicating the operation plan (changed operation plan) of the multiple devices 4 (see FIGS. 6 and 7). FIG. 6 shows an example of a sensing plan before the operation plan of the multiple devices 4 (devices A to C) is changed, and FIG. 7 shows an example of a sensing plan after the operation plan of the multiple devices 4 (devices A to C) is changed. As shown in FIGS. 6 and 7, the sensing plan of the wireless sensor 6 is changed for each device 4 in response to the change in the operation plan of the multiple devices 4. The management device 8 stores the sensing plan set for each wireless sensor 6 on the GUI 26 in the storage unit 24.

[0030] In S202, the sensing plan for each of the multiple wireless sensors 6 set in the management device 8 is transmitted to the mobile terminal 10 by wired communication or wireless communication via the data communication unit 28 of the management device 8. The mobile terminal 10 acquires the sensing plan for each of the multiple wireless sensors 6 set in the management device 8 (the sensing plan for each of the multiple wireless sensors 6 stored in the memory unit 24) via the data communication unit 28 of the management device 8.

[0031] In S203, the operator of the plant 100 carries the mobile terminal 10 and moves to an area within the plant 100 where the data communication units 20 of the wireless sensors 6 and the mobile terminal 10 can communicate wirelessly.

[0032] In S204, the operator of the plant 100 determines whether each of the multiple wireless sensors 6 is in the sleep mode or the deep sleep mode, and if any wireless sensor 6 is in the deep sleep mode, in S205, the operator presses the switch 19 of the wireless sensor 6 in the deep sleep mode to switch the mode of that wireless sensor 6 from the deep sleep mode to the sleep mode. For the wireless sensor 6 in the sleep mode, the process proceeds to S206.

[0033] In S206, the mobile terminal 10 transmits the sensing plan for each wireless sensor 6 acquired from the management device 8 in S202 (the changed sensing plan corresponding to each wireless sensor 6) to each of the wireless sensors 6 executing the sleep mode in S204 and the wireless sensors 6 switched to the sleep mode in S205. Each of the multiple wireless sensors 6 receives the sensing plan for each wireless sensor 6 transmitted from the mobile terminal 10 in S206.

[0034] In S207, each of the multiple wireless sensors 6 updates the sensing plan for each wireless sensor 6 stored in the storage unit 18 to the sensing plan for each wireless sensor 6 received from the mobile terminal 10 in S206. The MCU 16 controls the sensor unit 14 to sense the state quantity of the device 4 based on the updated sensing plan.

[0035] In the above-described state quantity monitoring system 2, the management device 8 is configured to be able to change the sensing plan output from the management device 8 in response to a change in the operation plan of at least one of the multiple devices 4. For this reason, even if the operation plans of the multiple devices 4 are changed due to a failure of the device 4 or related devices, a change in the operation plan of the plant 100, or the like, it is possible to change the sensing plan of the wireless sensor 6 in response to the changed operation plan.

[0036] In some embodiments, in the above S201, the operator of the plant 100 may set the sensing period of the sensing plan for each of the multiple wireless sensors 6 on the GUI 26 according to the importance of each of the multiple devices 4. In this case, for example, the sensing period of the wireless sensor 6 corresponding to a device 4 with a relatively high importance among the multiple devices 4 may be shorter than the sensing period of the wireless sensor 6 corresponding to a device 4 with a relatively low importance among the multiple devices 4. For example, the sensing period of the wireless sensor 6 corresponding to a device 4 with a relatively high importance among the multiple devices 4 may be set to every second, and the sensing period of the wireless sensor 6 corresponding to a device 4 with a relatively low importance among the multiple devices 4 may be set to every hour.

[0037] Examples of equipment 4 with high importance include equipment with a high probability of failure, equipment that is not redundant and whose failure will directly lead to the shutdown of the plant 100, equipment with a long lead time for replacement parts, equipment that requires a long time to repair after a failure, etc.

[0038] As described above, the management device 8 is configured to be able to change the sensing cycle of the wireless sensor 6 for each of the multiple devices 4 in accordance with the importance of each of the multiple devices 4 for the sensing plan output from the management device 8. Therefore, by setting an appropriate sensing cycle of the wireless sensor 6 in accordance with the importance of the device 4 in the sensing plan of the wireless sensor 6, it is possible to ensure the reliability of the plant 100 while reducing the power consumption of the wireless sensor 6.

[0039] FIG. 8 is a diagram showing another example of a flow for changing the sensing plan of the wireless sensor 6 in the state quantity monitoring system 2 shown in FIG.

[0040] For example, in the status quantity monitoring system 2, if it becomes necessary to change the sensing plan of the wireless sensor 6 due to a change in the failure risk of a target device 4, which is any one of the multiple devices 4 (such as replacement, repair, maintenance, or deterioration over time of the target device 4), the sensing plan may be changed in accordance with the flow shown in Figure 8.

[0041] In S300 shown in FIG. 8, the management device 8 judges whether or not there is a change in the failure risk of the target device 4, and if there is a change in the failure risk of the target device 4, judges whether the failure risk of the target device 4 has increased or decreased. In S300, the management device 8 judges whether the failure risk of the target device 4 has increased or decreased according to the relationship between the change factor of the failure risk and the increase or decrease in the failure risk shown in FIG. 9. As shown in FIG. 9, the management device 8 judges that the failure risk of the target device 4 has decreased when the target device 4 has been replaced, judges that the failure risk of the target device 4 has decreased when the target device 4 has been repaired, judges that the failure risk of the target device 4 has decreased when maintenance of the target device 4 has been performed, and judges that the failure risk of the target device 4 has increased when aging deterioration of the target device 4 has progressed. Regarding aging deterioration, for example, in the case where the wireless sensor 6 is a vibration sensor, AI (artificial intelligence) is used to calculate the aging deterioration from the vibration data of the device 4 measured by the wireless sensor 6. The remaining life of the device 4 may be evaluated using a sensing intelligence or the like, and the sensing cycle of the sensing plan of the wireless sensor 6 may be determined based on the evaluation result of the remaining life.

[0042] If the management device 8 determines in S300 that there has been a change in the failure risk of the target device 4 and that the failure risk has increased, in S301a, the management device 8 sets (changes) the sensing plan of the target device 4 stored in the storage unit 24 so as to shorten the sensing period of the sensing plan. Note that S302a to S307a following S301a are the same as S202 to S207 described above, respectively.

[0043] When the management device 8 determines in S300 that there has been a change in the failure risk of the target device 4 and that the failure risk has decreased, in S301b, the management device 8 sets (changes) the sensing plan of the target device 4 stored in the storage unit 24 so as to lengthen the sensing period of the sensing plan. Note that S302b to S307b following S301b are the same as S202 to S207 described above, respectively.

[0044] In the above-described state quantity monitoring system 2, the management device 8 is configured to be able to change the sensing plan output from the management device 8 in response to a change in the failure risk of at least one of the multiple devices 4. For this reason, when the failure risk of the target device 4 increases, the sensing cycle of the wireless sensor 6 corresponding to the target device 4 can be shortened to enable early detection of anomalies, thereby reducing the risk of shutting down the plant 100. On the other hand, when the failure risk of the target device 4 decreases, the sensing cycle of the wireless sensor 6 corresponding to the target device 4 can be lengthened to reduce the power consumption of the battery 12 built into the wireless sensor 6, thereby enabling the wireless sensor to be used for a long period of time.

[0045] In some embodiments, for example as shown in FIG. 10 , the above-mentioned condition quantity monitoring system 2 may further include a control device 30 that controls the equipment 4, and a gateway 32 as a repeater that relays wireless communication between the control device 30 and the wireless sensor 6.

[0046] The control device 30 may be configured to include a storage device such as a RAM (Random Access Memory) or a ROM (Read Only Memory), a processor such as a CPU (Central Processing Unit), and a data communication unit (input / output device), and to realize its functions by the processor executing a program stored in the storage device.

[0047] The gateway 32 may be configured to include a memory unit 33 (storage device) such as a RAM, a ROM, etc., an MCU 34, and a data communication unit 35 (input / output device), and to realize its functions by the MCU 34 executing a program stored in the memory unit 33.

[0048] The control device 30 is configured to control the start and stop of each of the multiple devices 4. The control device 30 transmits a start signal for starting the target device 4, which is any one of the multiple devices 4, to the target device 4, and at the same time transmits a command (sensing period shortening command) for shortening the sensing period of the wireless sensor 6 for the target device 4 in a period of a transient state from the start of the target device 4 until the target device 4 reaches a steady state, to the wireless sensor 6 via the gateway 32 in the plant 100 by wireless communication, as shown in FIG. 11. Note that the above-mentioned transient state means a period from the start of the target device 4 until the current flowing through the target device 4 (current flowing from the control device 30 to the target device 4 to drive the target device 4) reaches a rated current, and the above-mentioned steady state means a state in which the current flowing through the target device 4 is constant at the rated current after the current flowing through the target device 4 reaches the rated current.

[0049] Based on a sensing period shortening command received from the control device 30 via the gateway 32, the wireless sensor 6 shortens the sensing period of the wireless sensor 6 for the target device 4 during the transitional state period from when the target device 4 is started up until when the target device 4 reaches a steady state, below the sensing period of the sensing plan stored in the memory unit 18 (the sensing period of the wireless sensor 6 for the target device 4 in the steady state).

[0050] As described above, by transmitting a start-up signal for starting up the target device 4 from the control device 30 to the target device 4 and also transmitting a command from the control device 30 to the wireless sensor 6 to shorten the sensing period of the wireless sensor 6 during the above-mentioned transient state, it becomes possible for the wireless sensor 6 to densely acquire state quantities of the transient state, which are useful data for detecting an abnormality in the target device 4, and the accuracy of detecting an abnormality in the target device 4 can be improved.

[0051] When the wireless sensor 6 is set within a distance where it can receive radio waves for wireless communication from the control device 30, the sensing cycle shortening command signal may be transmitted directly from the control device 30 to the wireless sensor 6 without going through the gateway 32. It is preferable to select the sensing cycle of the wireless sensor 6 in the transient state and the sensing cycle of the wireless sensor 6 in the steady state according to the purpose, and for example, the former may be every second, and the latter may be every minute to every hour.

[0052] 1 to 9 may further include a control device 30 that controls the device 4, a gateway 32 that serves as a repeater that relays wireless communication between the control device 30 and the wireless sensor 6, and a current sensor 38. In the embodiment shown in FIG. 12, the same components as those in the embodiment shown in FIG. 10 are denoted by the same reference numerals and description thereof will be omitted.

[0053] In the embodiment shown in FIG. 12, the current sensor 38 measures the current flowing from the control device 30 to the target device 4, and transmits the measurement results to the gateway 32 one by one via the current sensor data receiving unit 36 ​​of the gateway 32. The storage unit 33 of the gateway 32 stores in advance the current value of the rated current of the target device 4. When the control device 30 transmits to the target device 4 a start-up signal for starting the target device 4, the current value of the current flowing from the control device 30 to the target device 4 measured by the current sensor 38 increases. When the current value measured by the current sensor 38 increases and exceeds a threshold value, the gateway 32 transmits, via wireless communication, to the wireless sensor 6 a command (sensing cycle shortening command) for shortening the sensing cycle of the wireless sensor 6 for the target device 4 during the period of the transition state until the target device 4 reaches the steady state, to be shorter than the sensing cycle of the sensing plan stored in the storage unit 18. In addition, when the current value measured by the current sensor 38 reaches the rated current of the target device 4, the gateway 32 transmits a command to the wireless sensor 6 via wireless communication to restore the sensing period of the wireless sensor 6 for the target device 4 (a command to make the sensing period longer than the sensing period in the transient state).

[0054] In the embodiment shown in FIG. 12, similarly to the embodiment shown in FIG. 10, the wireless sensor 6 can densely acquire state quantities of a transient state, which are useful data for detecting an abnormality in the target device 4, thereby improving the accuracy of detecting an abnormality in the target device 4.

[0055] FIG. 13 is a diagram showing another example of the flow for changing the sensing plan of the wireless sensor 6 in the state quantity monitoring system 2 shown in FIG.

[0056] In the status quantity monitoring system 2, the sensing plan for the target device 4, which is any one of the multiple devices 4, may be changed according to the degree of deterioration or damage of the target device 4, for example, in accordance with the flow shown in FIG.

[0057] In S401 shown in FIG. 13, the wireless sensor 6 provided in the target device 4 performs sensing of the target device 4 in accordance with the sensing plan stored in the memory unit 18 (the sensing plan transmitted from the mobile terminal 10 described above).

[0058] In S402, the MCU 16 of the wireless sensor 6 provided in the target device 4 determines whether or not the state quantity of the target device 4 measured by the sensor unit 14 exceeds the first threshold value (see FIG. 14). If the MCU 16 of the wireless sensor 6 determines in S402 that the state quantity of the target device 4 measured by the sensor unit 14 does not exceed the first threshold value, the process returns to S401.

[0059] In S402, when the MCU 16 of the wireless sensor 6 determines that the state quantity of the target device 4 measured by the sensor unit 14 exceeds the first threshold, in S403, the MCU 16 updates the sensing plan stored in the storage unit 18 so as to shorten the sensing period of the wireless sensor 6 for the target device 4 in the sensing plan stored in the storage unit 18. Note that, when the state quantity of the target device 4 measured by the sensor unit 14 exceeds a second threshold (see FIG. 14) that is larger than the first threshold, the MCU 16 may transmit warning information to the mobile terminal 10, warning the mobile terminal 10 to stop operation of the target device 4. In addition, the first threshold and the second threshold are stored in the storage unit 33, and are read out from the storage unit 33 and used for the above determination in S402.

[0060] A new device or a device that has been replaced for a short time has a low risk of aging or damage. For this reason, the sensing cycle of the wireless sensor 6 is relatively long when the state quantity of the target device 4 measured by the sensor unit 14 does not exceed the first threshold as described above, and the sensing cycle of the wireless sensor 6 is relatively short when the state quantity of the target device 4 measured by the sensor unit 14 exceeds the first threshold compared to when the state quantity does not exceed the first threshold. That is, the sensing cycle of the target device 4 is long during a period when the risk of aging or damage of the target device 4 is low, and when the risk increases, the sensing cycle of the target device 4 is shortened according to the state of the risk. This makes it possible to achieve both a reduction in power consumption of the wireless sensor 6 and an improvement in the reliability of the device 4.

[0061] FIG. 15 is a diagram showing another example of the flow for changing the sensing plan of the wireless sensor 6 in the state quantity monitoring system 2 shown in FIG.

[0062] In the state quantity monitoring system 2, the sensing plan may be changed according to the degree of deterioration over time or damage of the target device 4, for example, following the flow shown in FIG.

[0063] 15, the wireless sensor 6 provided in the target device 4 senses the state quantities of the target device 4 in accordance with the sensing plan (the sensing plan transmitted from the mobile terminal 10 described above) stored in the storage unit 18. Data on the state quantities of the target device 4 measured by the wireless sensor 6 in S501 is transmitted from the data communication unit 20 of the wireless sensor 6 to the mobile terminal 10, and then transmitted from the mobile terminal to the management device 8.

[0064] In S501, the CPU 22 of the management device 8 determines whether or not the state quantity of the target device 4 measured by the wireless sensor 6 in S500 exceeds a first threshold value (see FIG. 14). If the CPU 22 of the management device 8 determines in S501 that the state quantity of the target device 4 measured by the wireless sensor 6 does not exceed the first threshold value, the process returns to S500.

[0065] If the CPU 22 of the management device 8 determines in S501 that the state quantity of the target device 4 measured by the wireless sensor 6 exceeds the first threshold, in S502, the CPU 22 sets a sensing plan based on the sensing plan of the wireless sensor 6 for the target device 4 stored in the storage unit 24 so as to shorten the sensing period of the wireless sensor 6 for the target device 4 in the sensing plan stored in the storage unit 18, and transmits the set sensing plan to the mobile terminal 10 via the data communication unit 28. The mobile terminal 10 acquires the sensing plan for the wireless sensor 6 of the target device 4 set in the management device 8 via the data communication unit 28 of the management device 8.

[0066] In S503, the operator of the plant 100 carries the mobile terminal 10 and moves to an area within the plant 100 where the data communication unit 20 of the wireless sensor 6 corresponding to the target device 4 and the mobile terminal 10 can communicate wirelessly.

[0067] In S504, the mobile terminal 10 transmits the sensing plan (the sensing plan with the shortened sensing period) acquired from the management device 8 in S502 to the wireless sensor 6 corresponding to the target device 4. The wireless sensor 6 corresponding to the target device 4 receives the sensing plan transmitted from the mobile terminal 10.

[0068] In S505, the wireless sensor 6 corresponding to the target device 4 updates the sensing plan for each wireless sensor 6 stored in the storage unit 18 to the sensing plan (the sensing plan with the shortened sensing cycle) received from the mobile terminal 10 in S504. The MCU 16 controls the sensor unit 14 so as to sense the state quantity of the device 4 based on the updated sensing plan. Note that, when the state quantity of the target device 4 measured by the sensor unit 14 exceeds a second threshold (see FIG. 14) that is larger than the first threshold, the MCU 16 may transmit warning information to the mobile terminal 10 to warn the mobile terminal 10 to stop operation of the target device 4. In addition, the first threshold and the second threshold are stored in the storage unit 33, and are read out from the storage unit 33 and used for the above-mentioned determination in S402.

[0069] 15, similarly to the flow shown in FIG. 13, it is possible to achieve both a reduction in power consumption of the wireless sensor 6 and an improvement in the reliability of the device 4. In the flow shown in FIG.

[0070] In some embodiments, as shown in FIG. 16, for example, the state quantity monitoring system 2 described with reference to FIG. 1 and the like may further include a sensor 9 (first sensor) for sensing a sign of damage to the device 4 for each device 4, in addition to the wireless sensor 6 provided for each device 4. The sensor 9 is a different type of sensor from the wireless sensor 6 described above, and is configured to sense a state quantity for the device 4 different from the state quantity sensed by the wireless sensor 6 described above. The state quantity sensed by the sensor 9 is a state quantity in which a sign of damage to the device 4 appears earlier than the state quantity sensed by the wireless sensor 6, depending on the mechanism of occurrence and progression of damage to the device 4. For example, when the device 4 is a rotating machine such as a pump, if the wireless sensor 6 is a temperature sensor, a pressure sensor, or a flow rate sensor, the sensor 9 may be a vibration sensor. Also, when the device 4 is a rotating machine such as a pump, if the wireless sensor is a temperature sensor, the sensor 9 may be a current sensor.

[0071] The sensor 9 includes a sensor unit 54, an MCU 56, a storage unit 58, and a data communication unit 60. The sensor 9 may be a battery-powered wireless sensor equipped with a battery, or a wired power supply type sensor using a power cable. The sensor unit 54 is configured to sense a state quantity different from that of the sensor unit 14, and the basic functions of the MCU 56, the storage unit 58, and the data communication unit 60 are similar to those of the MCU 16, the storage unit 18, and the data communication unit 20. Hereinafter, the state quantity sensed by the wireless sensor 6 for the device 4 will be referred to as the "first state quantity," and the state quantity sensed by the sensor 9 for the device 4 will be referred to as the "second state quantity."

[0072] In the embodiment shown in FIG. 16, the mode of the wireless sensor 6 may be switched according to the flow shown in FIG. 17, for example.

[0073] As shown in FIG. 17, in S601, a wireless sensor 6 corresponding to a target device 4, which is any one of a plurality of devices 4, is waiting in a sleep mode or a deep sleep mode, and a sensor 9 corresponding to the target device 4 senses a second state quantity of the target device 4.

[0074] In S602, the sensor 9 determines whether or not the second state amount of the target device 4 sensed by the sensor 9 in S601 exceeds a third threshold (see FIG. 18). If it is determined in S602 that the second state amount of the target device 4 sensed by the sensor 9 does not exceed the third threshold, the process returns to S601.

[0075] If it is determined in S602 that the second state quantity of the target device 4 sensed by the sensor 9 exceeds the third threshold, in S603, the sensor 9 transmits a signal indicating that the second state quantity of the target device 4 sensed by the sensor 9 exceeds the third threshold.

[0076] In S604, when the mobile terminal 10 receives a signal indicating that the second state quantity of the target device 4 sensed by the sensor 9 exceeds the third threshold, the mode of the wireless sensor 6 corresponding to the target device 4 is switched from the sleep mode or deep sleep mode to the sensing mode. When switching from the deep sleep mode to the sensing mode, the operator of the plant 100 may press the switch 19 to switch from the deep sleep mode to the sleep mode as described above, and then the wireless sensor 6 corresponding to the target device 4 may switch from the sleep mode to the sensing mode. Thereafter, the wireless sensor 6 corresponding to the target device 4 senses the first state quantity of the target device 4 in accordance with the sensing plan stored in the memory unit 33 of the wireless sensor 6.

[0077] As described above, power consumption is reduced by the deep sleep mode until the second state quantity of the target device 4 sensed by the sensor 9 exceeds the third threshold, and at the stage when the second state quantity of the target device 4 sensed by the sensor 9 exceeds the third threshold, i.e., at the stage when deterioration over time or damage begins to become apparent, sensing of the first state quantity corresponding to the progress of deterioration over time or damage is started, thereby making it possible to accurately detect deterioration over time or damage of the target device 4. Therefore, deterioration over time or damage of the target device 4 can be accurately detected while reducing the power consumption of the wireless sensor 6.

[0078] The present disclosure is not limited to the above-described embodiments, and includes modifications to the above-described embodiments and appropriate combinations of these modifications.

[0079] The contents described in each of the above embodiments can be understood, for example, as follows.

[0080] (1) A state quantity monitoring system according to at least one embodiment of the present disclosure (e.g., the above-described state quantity monitoring system 2) A state quantity monitoring system for monitoring state quantities of a plurality of devices (e.g., the above-mentioned plurality of devices 4) arranged in a plant (e.g., the above-mentioned plant 100), a battery-powered wireless sensor (e.g., the wireless sensor 6 described above) provided in each of the plurality of devices and configured to sense a first state quantity of the device; a management device (e.g., the above-mentioned management device 8) configured to be capable of outputting a sensing plan, which is information including at least one of a time, a cycle, and a period for sensing a first state quantity of the device by the wireless sensor, for each of the plurality of wireless sensors; A mobile terminal (e.g., the mobile terminal 10 described above); Equipped with Data of the first state quantity sensed by each of the multiple wireless sensors is transmitted to the management device via the mobile terminal, and the sensing plan for each of the multiple wireless sensors output from the management device is transmitted to the wireless sensor corresponding to the sensing plan via the mobile terminal.

[0081] According to the state quantity monitoring system described in (1) above, data on the first state quantity of each device sensed by each of the multiple wireless sensors is transmitted to the management device via the mobile terminal, and a sensing plan for each of the multiple wireless sensors output from the management device is transmitted to the wireless sensor corresponding to each sensing plan via the mobile terminal. Therefore, by a plant operator or the like carrying a mobile terminal moving to a position close to the wireless sensor, it becomes possible to realize transmission of the sensing plan from the mobile terminal to the wireless sensor and transmission of the first state quantity data of each device from the wireless sensor to the mobile terminal using a power-saving communication means (for example, the above-mentioned BLE or LPWA, etc.), and it is possible to reduce the power required for communication between the mobile terminal and the wireless sensor. Therefore, in a state quantity monitoring system that measures the state quantities of plant equipment using a battery-powered wireless sensor, it is possible to reduce the power consumption of the wireless sensor.

[0082] (2) In some embodiments, in the state quantity monitoring system described in (1) above, The wireless sensor is configured to be able to execute a standby mode in which the wireless sensor does not sense the device; In the standby mode, the wireless sensor is configured to transmit a signal to notify the mobile terminal of the presence of the wireless sensor, and to periodically repeat a state in which it is able to receive information indicating the sensing plan from the mobile terminal.

[0083] According to the state quantity monitoring system described in (2) above, during the period when the standby mode is being executed, the power consumption of the wireless sensor can be reduced compared to, for example, a case in which the device is constantly sensed, a signal indicating the presence of the wireless sensor is constantly emitted, and a state in which information indicating the sensing plan can always be received from the mobile terminal is constantly maintained.

[0084] (3) In some embodiments, in the state quantity monitoring system according to (1) or (2), The wireless sensor is configured to be capable of executing a sleep mode in which the wireless sensor does not sense the device or emit a signal; The wireless sensor is configured to receive, in the sleep mode, information indicative of the sensing plan from the mobile terminal.

[0085] According to the status quantity monitoring system described in (3) above, during the period when the sleep mode is being executed, it is possible to receive information indicating a sensing plan from the mobile terminal while reducing the power consumption of the wireless sensor compared to the case where the device is sensed and a signal is transmitted.

[0086] (4) In some embodiments, in the state quantity monitoring system according to any one of (1) to (3) above, The wireless sensor is configured to be capable of executing a deep sleep mode in which it does not sense the device or emit or receive signals.

[0087] According to the state quantity monitoring system described in (4) above, during the period when the deep sleep mode is being executed, the power consumption of the wireless sensor can be reduced compared to when the device is sensing and transmitting signals or during the period when the above-mentioned sleep mode is being executed.

[0088] (5) In some embodiments, in the state quantity monitoring system according to any one of (1) to (4) above, The management device is configured to be able to change the sensing plan output from the management device in response to a change in an operation plan of at least one of the plurality of devices.

[0089] According to the state quantity monitoring system described in (5) above, even if the operation plan of the equipment is changed due to, for example, a failure of the equipment or related equipment or a change in the plant operation plan, it is possible to change the sensing plan of the wireless sensor in accordance with the changed operation plan.

[0090] (6) In some embodiments, in the state quantity monitoring system according to any one of (1) to (5) above, The management device is configured to be able to change the sensing plan output from the management device in response to a change in a failure risk of at least one device among the plurality of devices.

[0091] According to the state quantity monitoring system described in (6) above, when the risk of failure of the target equipment increases, the sensing cycle of the wireless sensor corresponding to the target equipment can be shortened to enable early detection of anomalies, thereby reducing the risk of plant shutdown. On the other hand, when the risk of failure of the target equipment decreases, the sensing cycle of the wireless sensor corresponding to the target equipment can be lengthened to reduce the power consumption of the battery built into the wireless sensor, thereby enabling the wireless sensor to be used for a long period of time.

[0092] (7) In some embodiments, in the state quantity monitoring system according to any one of (1) to (6) above, Further comprising a control device (e.g., the above-mentioned control device 30) configured to control the activation of a target device that is any one of the plurality of devices; The control device is configured to transmit a startup signal to the target device for starting up the target device, and to transmit a command to the wireless sensor to shorten the sensing period of the wireless sensor for the target device during a transitional state period from when the target device is started until the target device reaches a steady state.

[0093] According to the state quantity monitoring system described in (7) above, a start-up signal for starting the target equipment is transmitted from the control device to the target equipment, and a command to shorten the sensing period of the wireless sensor during the above-mentioned transient state is transmitted from the control device to the wireless sensor. This enables the wireless sensor to densely acquire state quantities of the transient state, which are useful data for detecting anomalies in the target equipment, and improves the accuracy of detecting anomalies in the target equipment.

[0094] (8) In some embodiments, in the state quantity monitoring system according to any one of (1) to (7) above, A control device (e.g., the above-mentioned control device 30) configured to control the activation of a target device that is any one of the plurality of devices; a current sensor (e.g., the current sensor 38 described above) that measures a current flowing from the control device to a target device that is one of the plurality of devices; Further comprising: The control device is configured, when the current value measured by the current sensor exceeds a threshold value, to send a command to the wireless sensor to shorten the sensing period of the wireless sensor for the target device during a transient state period from when the target device is started up to when the target device reaches a steady state.

[0095] According to the status quantity monitoring system described in (8) above, similarly to the status monitoring system described in (7) above, it becomes possible for wireless sensors to densely acquire transient state quantities, which are useful data for detecting anomalies in the target equipment, thereby improving the accuracy of detecting anomalies in the target equipment.

[0096] (9) In some embodiments, in the state quantity monitoring system according to any one of (1) to (8) above, The management device is configured to be able to change a sensing period of the wireless sensor for each of the plurality of devices in accordance with the importance of each of the plurality of devices for the sensing plan output from the management device.

[0097] According to the status quantity monitoring system described in (9) above, by setting an appropriate sensing cycle for the wireless sensor in accordance with the importance of the equipment in the sensing plan for the wireless sensor, it is possible to ensure the reliability of the plant while reducing the power consumption of the wireless sensor.

[0098] (10) In some embodiments, in the state quantity monitoring system according to any one of (1) to (9), a first sensor (e.g., the sensor 9 described above) that senses a second state quantity of a target device that is any one of the plurality of devices, the second state quantity being different from the first state quantity sensed by the wireless sensor; The wireless sensor is configured to be capable of executing a deep sleep mode in which the wireless sensor does not sense the device or transmit or receive signals; the wireless sensor executes the deep sleep mode when the second state amount of the target device sensed by the first sensor does not exceed a threshold; When the second state amount of the target device sensed by the first sensor exceeds a threshold, the wireless sensor starts sensing the first state amount of the target device.

[0099] According to the state quantity monitoring system described in (10) above, if a state quantity that shows signs of damage to the device earlier than the first state quantity is used as the second state quantity, power consumption is reduced by using a deep sleep mode until the second state quantity of the target device sensed by the first sensor exceeds a threshold, and at the stage where the second state quantity of the target device sensed by the first sensor exceeds the threshold, i.e., at the stage where the aging deterioration or damage begins to become apparent, sensing of the first state quantity that corresponds to the progress of the aging deterioration or damage is started, thereby making it possible to accurately detect aging deterioration or damage of the target device. Therefore, it is possible to accurately detect aging deterioration or damage of the target device while reducing the power consumption of the wireless sensor.

[0100] (11) In some embodiments, in the state quantity monitoring system according to (10), The second state quantity is a state quantity in which a symptom of damage to the device appears earlier than the first state quantity.

[0101] According to the state quantity monitoring system described in (11) above, it is possible to accurately detect deterioration and damage of a target device while reducing the power consumption of the wireless sensor.

[0102] (12) In some embodiments, in the state quantity monitoring system according to (10) or (11), The first sensor is a vibration sensor and the wireless sensor is a temperature sensor, a pressure sensor or a flow sensor.

[0103] According to the condition quantity monitoring system described in (12) above, the vibration (displacement, speed, or acceleration) of the target equipment sensed by the vibration sensor is a condition quantity that is more likely to indicate damage to the equipment earlier than the temperature, pressure, or flow rate of the target equipment. Therefore, as described in (10) or (11) above, it is possible to accurately detect deterioration and damage to the target equipment while reducing the power consumption of the wireless sensor.

[0104] (13) In some embodiments, in the state quantity monitoring system according to (10) or (11), The first sensor is a current sensor and the wireless sensor is a temperature sensor.

[0105] According to the condition quantity monitoring system described in (13) above, the current value of the target device sensed by the current sensor is a condition quantity that is more likely to indicate damage to the device earlier than the temperature of the target device. Therefore, as described in (10) or (11) above, it is possible to accurately detect deterioration and damage to the target device while reducing the power consumption of the wireless sensor.

[0106] (14) In some embodiments, in the state quantity monitoring system according to any one of (1) to (13), When the first state quantity of a target device that is any of the plurality of devices sensed by the wireless sensor exceeds a threshold, a sensing cycle of the target device by the wireless sensor is shortened.

[0107] New devices or devices that have only recently been replaced have a low risk of deterioration over time or damage. For this reason, in the condition monitoring system described in (14) above, the sensing period of the wireless sensor is relatively long when the first state quantity of the target device does not exceed the threshold, and the sensing period of the wireless sensor is shortened when the first state quantity exceeds the threshold. In other words, the sensing period of the target device is long during a period when the risk of deterioration over time or damage of the target device is low, and when the risk increases, the sensing period of the target device is shortened according to the state of the risk. This makes it possible to achieve both a reduction in power consumption of the wireless sensor and an improvement in the reliability of the device.

[0108] (15) A method for operating a state quantity monitoring system according to at least one embodiment of the present disclosure, A method for operating a state quantity monitoring system (e.g., the above-mentioned state quantity monitoring system 2) for monitoring state quantities of a plurality of devices (e.g., the above-mentioned plurality of devices 4) arranged in a plant (e.g., the above-mentioned plant 100), The state quantity monitoring system includes: a battery-powered wireless sensor (e.g., the wireless sensor 6 described above) provided in each of the plurality of devices and configured to sense a first state quantity of the device; a management device (e.g., the above-mentioned management device 8) configured to be capable of outputting a sensing plan, which is information including at least one of a time, a cycle, and a period for sensing a first state quantity of the device by the wireless sensor, for each of the plurality of wireless sensors; A mobile terminal (e.g., the mobile terminal 10 described above); Equipped with The operation method includes: transmitting data of the first state amount sensed by each of the plurality of wireless sensors to the management device via the mobile terminal; transmitting the sensing plan for each of the plurality of wireless sensors output from the management device to the wireless sensor corresponding to the sensing plan via the mobile terminal; Equipped with.

[0109] According to the operation method of the state quantity monitoring system described in (15) above, data of the first state quantity of each device sensed by each of the multiple wireless sensors is transmitted to the management device via the mobile terminal, and a sensing plan for each of the multiple wireless sensors output from the management device is transmitted to the wireless sensor corresponding to each sensing plan via the mobile terminal. Therefore, by an operator of the plant carrying a mobile terminal or the like moving to a position close to the wireless sensor, it becomes possible to realize transmission of the sensing plan from the mobile terminal to the wireless sensor and transmission of the first state quantity data of each device from the wireless sensor to the mobile terminal using a power-saving communication means (for example, the above-mentioned BLE or LPWA, etc.), and it is possible to reduce the power required for communication between the mobile terminal and the wireless sensor. Therefore, in a state quantity monitoring system that measures the state quantities of the plant equipment using a battery-powered wireless sensor, it is possible to reduce the power consumption of the wireless sensor. [Explanation of symbols]

[0110] 2. Status monitoring system 4 Equipment 6. Wireless Sensors 8 Management device 9 Sensors 10 Mobile devices 12 Battery 14,54 Sensor section 18,24,33,58 Storage section 19 Switch 20,28,35,60 Data Communication Department 22 CPU 30 Control device 32 Gateway 16,34,56 MCU 36 Current sensor data receiver 38 Current Sensor 100 Plants

Claims

1. A state quantity monitoring system for monitoring state quantities of a plurality of devices arranged in a plant, comprising: a battery-powered wireless sensor provided in each of the plurality of devices and configured to sense a first state quantity of the device; a management device configured to be capable of outputting, for each of the plurality of wireless sensors, a sensing plan, the sensing plan being information including at least one of a time, a cycle, and a period for sensing a first state quantity of the device by the wireless sensor; A mobile device; Equipped with A status quantity monitoring system, wherein data of the first status quantity sensed by each of the plurality of wireless sensors is transmitted to the management device via the mobile terminal, and the sensing plan for each of the plurality of wireless sensors output from the management device is transmitted to the wireless sensor corresponding to the sensing plan via the mobile terminal.

2. the wireless sensor is configured to be able to execute a standby mode in which the wireless sensor waits without sensing the device; 2. The condition quantity monitoring system according to claim 1, wherein the wireless sensor is configured, in the standby mode, to transmit a signal to the mobile terminal notifying the mobile terminal of the presence of the wireless sensor and to periodically repeat a state in which the wireless sensor can receive information indicating the sensing plan from the mobile terminal.

3. The wireless sensor is configured to be capable of executing a sleep mode in which the wireless sensor does not sense the device or emit a signal; The condition quantity monitoring system according to claim 2 , wherein the wireless sensor is configured to be able to receive information indicating the sensing plan from the mobile terminal in the sleep mode.

4. The condition quantity monitoring system according to claim 3 , wherein the wireless sensor is configured to be capable of executing a deep sleep mode in which the wireless sensor does not sense the device or transmit or receive signals.

5. The state quantity monitoring system according to claim 1 , wherein the management device is configured to be able to change the sensing plan output from the management device in response to a change in an operation plan of at least one of the plurality of devices.

6. 2. The condition quantity monitoring system according to claim 1, wherein the management device is configured to be able to change the sensing plan output from the management device in response to a change in a failure risk of at least one of the plurality of devices.

7. A control device configured to control the activation of a target device that is any one of the plurality of devices, 2. The state quantity monitoring system according to claim 1, wherein the control device is configured to transmit a start-up signal to the target device for starting the target device, and to transmit a command to the wireless sensor to shorten a sensing cycle of the wireless sensor for the target device during a transitional state period from when the target device is started until the target device reaches a steady state.

8. A control device configured to control the activation of a target device that is any one of the plurality of devices; a current sensor that measures a current flowing from the control device to a target device that is one of the plurality of devices; Further comprising:

2. The state quantity monitoring system according to claim 1, wherein the control device is configured, when the value of the current measured by the current sensor exceeds a threshold value, to transmit a command to the wireless sensor to shorten a sensing cycle of the wireless sensor for the target device during a transient state period from when the target device is started until the target device reaches a steady state.

9. 2. The condition quantity monitoring system according to claim 1, wherein the management device is configured to be able to change the sensing period of the wireless sensor for each of the plurality of devices in accordance with the importance of each of the plurality of devices for the sensing plan output from the management device.

10. a first sensor configured to sense a second state quantity of a target device that is any one of the plurality of devices, the second state quantity being different from the first state quantity sensed by the wireless sensor; The wireless sensor is configured to be capable of executing a deep sleep mode in which the wireless sensor does not sense the device or transmit or receive signals; the wireless sensor executes the deep sleep mode when the second state amount of the target device sensed by the first sensor does not exceed a threshold; 2 . The state quantity monitoring system according to claim 1 , wherein the wireless sensor starts sensing the first state quantity of the target device when the second state quantity of the target device sensed by the first sensor exceeds a threshold value.

11. 11. The state quantity monitoring system according to claim 10, wherein the second state quantity is a state quantity in which a symptom of damage to the device appears earlier than the first state quantity.

12. The condition quantity monitoring system according to claim 10 , wherein the first sensor is a vibration sensor, and the wireless sensor is a temperature sensor, a pressure sensor, or a flow rate sensor.

13. The condition quantity monitoring system according to claim 10 , wherein the first sensor is a current sensor and the wireless sensor is a temperature sensor.

14. 2. The status quantity monitoring system according to claim 1, wherein, for a target device which is any one of the plurality of devices, when the first status quantity of the target device sensed by the wireless sensor exceeds a threshold value, a sensing period of the wireless sensor for the target device is shortened.

15. 1. A method for operating a state quantity monitoring system for monitoring state quantities of a plurality of devices arranged in a plant, comprising: The state quantity monitoring system includes: a battery-powered wireless sensor provided in each of the plurality of devices and configured to sense a first state quantity of the device; a management device configured to be capable of outputting, for each of the plurality of wireless sensors, a sensing plan, the sensing plan being information including at least one of a time, a cycle, and a period for sensing a first state quantity of the device by the wireless sensor; A mobile device; Equipped with The operation method includes: transmitting data of the first state amount sensed by each of the plurality of wireless sensors to the management device via the mobile terminal; transmitting the sensing plan for each of the plurality of wireless sensors output from the management device to the wireless sensor corresponding to the sensing plan via the mobile terminal; A method for operating a state quantity monitoring system comprising:

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