TW202209133A - Method for determining communication path in monitoring system, and monitoring system - Google Patents

Abstract

Provided is a method for finalizing a communication path in a monitoring system, the method comprising: a step for transmitting, from one or a plurality of monitoring devices installed in a rotating machine to detect a state quantity of the rotating machine to a plurality of higher-level apparatuses capable of performing wireless communication with the one or a plurality of monitoring devices, a wireless communication signal of a predetermined intensity including information enabling identification of at least the one or a plurality of monitoring devices as the transmission source; a step for acquiring communication state information of the wireless communication signal received in each of the plurality of higher-level apparatuses; and a step for, on the basis of the communication state information acquired by each of the plurality of higher-level apparatuses, selecting one monitoring device among the one or a plurality of monitoring devices and one higher-level apparatus that acquires information including the state quantity detected by the one monitoring device.

Description

Method for determining communication path in monitoring system and monitoring system

The present disclosure relates to a method for determining a communication path in a monitoring system and a monitoring system.

In the technical field of rotating machinery for conveying fluids, in order to detect abnormalities in rotating machinery used in large-scale machinery and manufacturing equipment in factories, a plurality of sensors are installed at appropriate positions of a rotating machinery to monitor the abnormality of the rotating machinery. The state of rotating machinery. For example, Japanese Patent Application Laid-Open No. 2003-036321 describes that when a plurality of sensors detect abnormal pumping of a rotating machine, the control system connected to the sensors notifies the monitoring system of its contents via a network. Rotating robots can be managed in a remote monitoring system.

(The problem that the invention intends to solve)

Furthermore, many of the rotating machines used in manufacturing equipment are installed in a plurality of places in the equipment. When it is desired to manage a plurality of rotating machines in such a facility, as disclosed in Japanese Patent Application Laid-Open No. 2003-036321, a plurality of sensors are installed in each rotating machine, and the detection results of the sensors are collected. , because the total number of sensors existing in the equipment is extremely large, the operation of connecting these sensors to the control system by wires is complicated, which may lead to an increase in the man-hours required to set up the rotating machinery. Therefore, instead of the above-mentioned wired connection, a wireless communication function is added to a plurality of sensors installed in the rotating machine, and an access point (including a wireless router) that can wirelessly communicate with the sensor can be installed at an appropriate position in the equipment. ) or higher-level communication devices such as gateways (hereinafter, these are collectively referred to as "upper-level devices"), when the detection results of the sensors are collected wirelessly, the above-mentioned wiring work can be omitted. However, at this time, since the upper-order machine is installed at an appropriate position in the device, for example, considering its communicable distance, etc., it is set at a specified interval, so the upper-order machine is located above the distance that can receive the signal transmitted from one sensor. The machine is not limited to 1. When a signal transmitted by a sensor is received by a plurality of upper-level machines, the plurality of upper-level machines that receive the signal transmit the same information (the information of the state quantity detected by one sensor) to the management device, which may cause The communication load and communication cost increase uselessly. In addition, when the management device side receives the same information multiple times, it may cause the management device side to manage the data of the state quantity of the rotating machine complicated.

In view of the above-mentioned problems, the present disclosure aims to provide a method and a monitoring system for determining a communication path in a monitoring system that can suppress communication load and communication cost and facilitate data management. (means to solve the problem)

In order to achieve the above-mentioned purpose, the method for determining the communication path in the monitoring system 1 of the first aspect of the present disclosure, as shown in FIG. 1 to FIG. 3 , includes: step S11 , which is to detect the detection of the communication path provided in the rotating machines P1 to Pn. One or a plurality of monitoring devices M11 to Mn2 of the state quantities of the rotating machines P1 to Pn transmit to a plurality of upper-level machines G1 to Gm capable of wirelessly communicating with the one or more monitoring devices M11 to Mn2 including at least one The wireless communication signals SG1, SG2 of the specified strength of the information of the one or more monitoring devices M11-Mn2 at the transmitting end can be specified; step S13, which is to obtain the received signal from the multiple upper-level machines G1-Gm, respectively. The communication state information of the wireless communication signals SG1 and SG2; and step S15, which is based on the communication state information respectively obtained by the plurality of upper-level machines G1-Gm, and selecting one or more of the monitoring devices M11-Mn2. A monitoring device, and an upper-level machine that obtains information including the state quantity detected by the one monitoring device.

In this configuration, a monitoring device and an upper-level device with the best wireless communication state when communicating with the monitoring device can be selected as a part of the communication path according to the wireless state information obtained by the upper-level device. Thereby, since the communication path of each monitoring apparatus in a monitoring system is individually determined, the monitoring system which suppresses the increase of the communication load and the communication cost at the time of carrying out abnormality detection can be provided.

The method for determining the communication path in the monitoring system 1 according to the second aspect of the present disclosure is shown in FIG. 3 . As shown in the method for determining the communication path in the monitoring system 1 according to the first aspect of the present disclosure, the aforementioned communication state information is Including the radio wave strength and stability of the aforementioned wireless communication signal.

In this configuration, in addition to the strength of the electric wave, the stability of the signal is also considered to select a monitoring device and an upper-level device, and can precisely select a monitoring device and an upper-level device constituting a communication path.

The method for determining the communication path in the monitoring system 1 according to the third aspect of the present disclosure is the same as the method for determining the communication path in the monitoring system 1 according to the first aspect of the present disclosure, wherein the one or more monitoring devices M11 to Mn2 It is the one that transmits the information including the aforementioned state quantity only to the aforementioned one upper-level machine.

In this configuration, by restricting the upper-order machines to be the transmission target of the state quantity information signal, the upper-order machines other than the transmission object are not affected by the signal.

The method for determining the communication path in the monitoring system 1 according to the fourth aspect of the present disclosure is the same as the method for determining the communication path in the monitoring system 1 according to the first or second aspect of the present disclosure. The above-mentioned management device C for communication with the plurality of upper-level machines G1-Gm or any one of the above-mentioned plurality of upper-order machines G1-Gm, receives the selected monitoring device and the above-mentioned one upper-order machine. When the instruction is re-selected, the aforementioned one monitoring device and the aforementioned one upper-level machine are re-selected.

With this configuration, even when the communication environment is changed due to various factors, the state quantity information signal can be collected quickly and reliably.

The monitoring system 1 of the fifth aspect of the present disclosure includes, as shown in FIGS. 1 and 2 , one or a plurality of monitoring devices M11 to Mn2 , which are installed in one or a plurality of the rotating machines P1 to Pn to detect The state quantities of the one or more rotating machines P1 to Pn; the plurality of high-level machines G1 to Gm, which can wirelessly communicate with the one or more monitoring devices M11 to Mn2, and are provided with a communication state information acquisition unit 25 35, which obtains the communication state information during the wireless communication with the one or a plurality of monitoring devices M11-Mn2; and the management device C, which obtains the information including the above-mentioned 1 from the plurality of upper-level machines G1-Gm The information of the state quantities of the one or more rotating machines P1 to Pn is managed, and a selection unit 43 is provided, which is obtained by the communication state information acquisition units 25 and 35 according to the plurality of upper-level machines G1 to Gm, respectively. The communication state information when wirelessly communicating with one of the one or more monitoring devices M11 to Mn2, selecting the one monitoring device and obtaining one of the information including the state quantity detected by the one monitoring device stage machine.

In this configuration, the management device can select a monitoring device and an upper-level device with the best wireless communication state when communicating with the monitoring device as a communication path according to the wireless state information obtained by the upper-level device. Thereby, since the communication path between each monitoring apparatus in a monitoring system and a management apparatus is determined individually, the increase of the communication load and the communication cost at the time of carrying out abnormality detection can be suppressed. In addition, the management device does not receive duplicate information, and it is easy to manage the state quantity information of the rotating machine collected in order to detect abnormality. (effect of invention)

By having the above-mentioned configuration, it is possible to provide a method and a monitoring system for specifying a communication path in a monitoring system that can suppress communication load and communication cost and facilitate data management.

This application is based on Japanese Patent Application No. 2020-137347 filed in Japan on August 17, 2020, the content of which forms a part of the content of this application. In addition, the present invention should be further fully understood from the following detailed description. The further application scope of this case should be clear from the following detailed description. However, the detailed description and specific examples are preferred embodiments of the present invention, and are described only for the purpose of description. It will be apparent to those skilled in the art that various changes and modifications can be made from the detailed description within the spirit and scope of the present invention. The applicant does not intend to contribute any of the described embodiments to the public, and the disclosed changes and alternatives, which may not be included in the scope of the patent application in terms of words and phrases, shall be regarded as part of the invention.

Hereinafter, various embodiments for implementing the present disclosure will be described with reference to the drawings. In addition, the following is a schematic representation of the range necessary for the description to achieve the purpose of the present disclosure, and the description of this part of the present disclosure mainly describes the necessary range, and the description is omitted for those skilled in the art.

FIG. 1 is a schematic diagram showing an example of a monitoring system according to an embodiment of the present disclosure. As shown in FIG. 1 , the monitoring system 1 of the present embodiment can be used to monitor n (1≦n) pumping devices P1 to be used as rotating machines in a manufacturing facility having a predetermined width, for example, in a factory F. The system of Pn constitutes. The monitoring system 1 may include m (1<m<n) upper-level machines G1 to Gm and a management device C in order to monitor the pumping devices P1 to Pn. In this embodiment, only the pump device is illustrated as the rotating machine, but other rotating machines such as a compressor, a turbine, a refrigerator, and a cooling tower may be used in place of the pump device or in addition to the pump device.

The pumping devices P1-Pn can be disposed at any position in the factory F, for example, a horizontal axis single-stage pump capable of transporting liquid. The pumping devices P1-Pn mainly include: a pump body 10 having an impeller inside; and a motor 11 composed of a permanent magnet motor, an induction motor, or an SR motor, which rotates the impeller in the pump body 10 . In addition, the pumping devices P1 to Pn are not limited to the horizontal axis single-stage pumping, for example, the vertical axis multistage pumping or the pumping devices of other structures of the underwater pumping may also be used. In addition, in the present embodiment, a plurality of pumping devices P1 to Pn having the same structure are arranged in the factory F for simplification of the description.

One to a plurality of monitoring devices M11 to Mn2 are mounted on the plurality of pump devices P1 to Pn, respectively. The monitoring devices M11 to Mn2 can be those that can detect the state quantities of the pump devices P1 to Pn to be installed. Here, the so-called state quantities of the pumping devices P1-Pn may include various parameter information related to the pumping devices P1-Pn, such as the discharge pressure and discharge flow rate of the pump body 10, and the generation of the pumping devices P1-Pn. vibration, the temperature of the pump body 10 or the motor 11, or the current value of the motor 11. As for the monitoring devices M11 to Mn2, those provided with various sensing units 14 (see FIG. 2 ) can be used. The sensing unit 14 includes a pressure sensor capable of detecting the discharge pressure of the pump body 10 , a flow rate sensor capable of detecting the discharge flow rate of the pump body 10 , and acceleration of vibration of the pump devices P1 to Pn. A sensor, a temperature sensor capable of detecting the temperature of the motor 11, or a current sensor capable of detecting the current of the motor 11, etc., but not limited to these. In addition, it is preferable that one to a plurality of monitoring devices M11 to Mn2 have a wireless communication function, and by using the wireless communication function, various information can be transmitted to the upper-level devices G1 to Gm.

The upper-level machines G1-Gm may be installed in the factory F at specified intervals to receive information transmitted from the monitoring devices M11-Mn2 installed in the plurality of pumping devices P1-Pn, and transmit them to the machines of the management device C. The upper-level machines G1-Gm may be machines with functions of access points or gateways. In this embodiment, the case where all of the upper-level machines G1 to Gm perform the function of a gateway is described. However, as long as each of the upper-level machines G1 to Gm has at least the function of an access point, this embodiment does not All of the upper-level machines G1 to Gm are required to be capable of network communication. Therefore, only a part of the upper-level devices G1 to Gm or only a separately provided gateway for network connection (not shown) in addition to the upper-level devices G1 to Gm can communicate with the network. In addition, the configuration of each upper-level machine G1-Gm in the factory F should take into account the communicable distance of wireless communication between the upper-level machine G1-Gm and the monitoring devices M11-Mn2, and not to form dead spots, for example, spaced apart several Set the interval from meters to tens of meters. Furthermore, the means of wireless communication between the above-mentioned higher-level machines G1-Gm and the monitoring devices M11-Mn2 typically uses international standards (eg, IEEE802.15.4, IEEE802.15.1, IEEE802.15.11a, 11b, 11g, 11n, 11ac, 11ad, ISO/IEC14513-3-10, IEEE802.15.4g) communication means (Bluetooth, Bluetooth Low Energy, Wi-Fi, ZigBee, Sub-GHz, EnOcean, etc.). Then, the information collected in each of the upper-level machines G1 to Gm is collectively managed by the management device C via the network NW, for example.

The management device C is used to collect and manage the state quantities of (one or) a plurality of pump devices P1-Pn in the factory F, for example, a data processing platform in the cloud can be used. The management device C is preferably connected to the network NW, and can manage the state quantities of the pumping devices P1-Pn by obtaining the information transmitted by the upper-level machines G1-Gm, and can detect abnormality or abnormal symptoms of the pumping devices P1-Pn (Hereinafter, these are collectively referred to as "abnormal"). An example of the abnormality detection method in the monitoring system of the present embodiment will be described later. In addition, in the present embodiment, the cloud data processing platform is exemplified as the management device C, but a known server computer, or a centralized monitoring system connected locally to the upper-level machines G1 to Gm or via the network NW, etc. may be used. The management device C is formed in the form.

Furthermore, it is preferable that the management device C of the monitoring system 1 of the present embodiment can be connected to the terminal device TD possessed by the administrator AD via the network NW. The terminal device TD can be a conventional computer, a mobile PC, a tablet device, etc., and the input and output operations between the management device C and the administrator AD can be realized by the terminal device TD.

In the monitoring system 1 having the above-described series of configurations, the upper-level devices G1 to Gm are installed at predetermined intervals in consideration of the communicable distance and the like as described above. Thereby, many of the monitoring devices M11 to Mn2 (eg, the monitoring devices M11 to M13 provided in the pump device P1 ) have only one upper-level machine (eg, the upper-level machine G1 ) within the communicable distance. In addition, in the monitoring devices (for example, monitoring devices M21 to M22 installed in the pump device P2) installed in the middle of two adjacent upper-level devices (for example, the upper-level device G1 and the upper-level device G2), the communication distance is There are 2 upper-order machines in memory. Therefore, in the monitoring devices ( M21 to M22 ) in which a plurality of upper-level devices exist within the communicable distance, wireless communication is possible between the respective upper-level devices ( G1 , G2 ). However, if the monitoring device transmits information including state quantities (hereinafter, also referred to as "state quantity information") to a plurality of upper-level devices, the same information is communicated multiple times, which leads to an increase in communication load and communication cost and management. The reason for the complexity of data management in device C. Therefore, each constituent element in the monitoring system 1 related to the determination method of the communication path in the monitoring system 1 described above will be described below.

2 is a schematic diagram showing a part of the monitoring system 1 according to one embodiment of the present disclosure, and more specifically, an outline of an example of a part that can constitute a communication path of the monitoring device M21 in which a plurality of upper-level devices G1 and G2 exist within the communicable range. block diagram. In addition, in the following description, only one monitoring device M21 is described to represent the monitoring device (although the state quantity detected by the sensing unit 14 and the installation position of the pumping device are different), but the basic structure of the monitoring device itself, other monitoring devices This monitoring device M21 may be the same. Similarly, in the following description, two of the upper-level machines G1 and G2 represent upper-level machines. However, the basic structure of the upper-level machine itself, other upper-level machines can also be used with these upper-level machines G1, G2, etc. G2 is the same.

As shown in FIG. 2 , the monitoring device M21 may mainly include a controller 12 , a wireless communication unit 13 , a sensing unit 14 , and a memory 15 . The controller 12 may include a computing device for controlling the entire monitoring device M21. In addition, the wireless communication unit 13 is a communication means for realizing wireless communication with a specific higher-order device, and includes a communication device such as an antenna, which can be used between the wireless communication units 21 and 31 of the higher-order devices G1 and G2 Two-way communicator. Furthermore, the sensing unit 14 may detect one or a plurality of state quantities of the pumping device P2 provided with the monitoring device M21. Then, the memory 15 may store the program executed in the controller 12 , the state quantity of the pumping device P2 detected in the sensing portion 14 , the unique address of the monitoring device M21 , and the like.

The wireless communication unit 13 of the monitoring device M21 can transmit the specified wireless communication signals SG1 and SG2 to the upper-level machines G1 and G2. The designated wireless communication signals SG1 and SG2 transmitted here may also include at least the unique address of the monitoring device M21 which is the transmission end of the signal on the upper-stage machines G1 and G2 receiving the signal as the information that can be identified. In addition, the wireless communication signals SG1, SG2 can appropriately include information about the pumping device P2 in which the monitoring device M21 is installed, according to the request from the upper-level machine G1, G2 or the management device C, etc. The installation position of the device M21 to the pumping device P2, the radio wave intensity when the wireless communication signals SG1 and SG2 are transmitted, or the state quantity detected by the sensing unit 14, etc. In addition, the wireless communication signals SG1 and SG2 of the present embodiment employ those that include the unique address as the monitoring device M21 can be identified. However, when the monitoring device M21 is the information that can be identified, it may be other than the unique address. information. In addition, the designated wireless communication signals SG1 and SG2 may be signals generated for specifying a communication path to be described later, or may be generated by using the monitoring device M21 for transmitting state quantity information to any upper-level device. In the present embodiment, the signal transmitted when the communication path is determined is called "wireless communication signal (SG1, SG2)", and after the communication path is determined, it is used to transmit the state quantity including the state quantity acquired by the monitoring devices M11 to Mn2 The information signal is called "state quantity information signal", and the two are displayed separately.

In the present embodiment, there are two upper-level devices G1 and G2 within the communication range of the monitoring device M21. These two upper-level machines G1, G2 function as gateways, and both may have the same configuration. In detail, as shown in FIG. 2 , the upper-level machines G1 and G2 may mainly include: wireless communication units 21 and 31 ; control units 22 and 32 ; network interfaces 23 and 33 ; and memories 24 and 34 .

The wireless communication units 21 and 31 are capable of at least two-way communication with the wireless communication unit 13 of the monitoring device M21, including communication devices such as antennas, in order to realize wireless communication at least with the monitoring device M21. In addition, the control units 22 and 32 may be arithmetic devices for controlling all of the upper-level devices G1 and G2. Furthermore, the network interfaces 23 and 33 may be interface units for connecting to the network NW represented by the Internet. Then, the memories 24 and 34 may store the programs executed in the control units 22 and 32 , and the state quantity information and communication state information of the pumping device P2 received via the wireless communication units 21 and 31 .

The control units 22 and 32 of the upper-level machines G1 and G2 may include: communication state information acquisition units 25 and 35 ; and state quantity information acquisition units 26 and 36 . The communication state information obtaining units 25 and 35 may be those for obtaining wireless state information from the wireless communication signals SG1 and SG2 obtained by the wireless communication units 21 and 31 . Here, the so-called wireless status information can be information showing the communication status of the wireless communication signals SG1 and SG2. Specifically, it can be at least one of the radio wave strength and stability of the wireless communication signals SG1 and SG2, and preferably includes both of them. By. In the wireless status information, the radio wave strengths (dBm) of the wireless communication signals SG1 and SG2 can be specified by using a conventional measuring device, and the stability of the wireless communication signals SG1 and SG2 can be, for example, based on the normal reception of the radio waves per unit time. The number of times, or whether the fluctuation (or deviation) of the received radio wave intensity is within a certain value is specified. In addition, the state quantity information acquisition units 26 and 36 may acquire the state quantity information signals received by the wireless communication units 21 and 31 . The state quantity information signal obtained here is transmitted to the management device C via the network interfaces 23 and 33, and can be used to detect the abnormality of the pumping device P2.

As shown in FIG. 2, the management apparatus C can be provided in the form of a virtual machine (VM) which comprises a cloud service, for example. The management device C constituted by the virtual machine is provided on the network NW in an accessible state, and may at least include the computing module 41 and the storage area 42 .

The operation module 41 of the management device C may include a selection unit 43 and an abnormality detection unit 44 . The selection unit 43 can be used to select the wireless state information of the wireless communication signals SG1 and SG2 obtained by the communication state information obtaining units 25 and 35 of the two upper-level machines G1 and G2 and the monitoring device M21 . The monitoring device M21 and the upper-order machine suitable for obtaining the state quantity information signal of the pumping device P2 detected by the monitoring device M21 are the upper-order machine G1 or the upper-order machine G2. The selection can also be performed automatically by the computing module 41 , or the wireless status information obtained by the upper-level machines G1 and G2 can be displayed on the monitor of the terminal device TD, and the selection can be realized by the administrator AD. In addition, the abnormality detection unit 44 may detect whether an abnormality occurs in the pumping devices P1-Pn according to the state quantities of the pumping devices P1-Pn. The anomaly detection method in the anomaly detection section 44 is preferably learned with a teacher (eg, using a neural network-like network or a Support Vector Machine) or without a teacher (eg, using an autoencoder or clustering (eg, using an autoencoder or clustering). Clustering), the post-learning model generated, or the automatic detection (or inference) using the rule base (Rule Base) that uses the threshold value. In addition, it is also possible to manually judge whether or not the administrator AD is abnormal by displaying the state quantities obtained by the respective upper-level devices G1 and G2 on the monitor of the terminal device TD.

In addition, the storage area 42 of the management device C may be used for storing various programs used by the computing module 41, or the acquired state quantities and communication state information of the pumping devices P1-Pn. The storage area 42 can be constituted by, for example, allocating an area of any database on the network.

Next, a method of specifying a communication path in the monitoring system 1 of the present embodiment will be described. In addition, in the following description, in the monitoring system 1, especially the part shown in FIG. 2, by specifying the upper-level machine that needs to obtain the state quantity information signal of the pumping device P2 detected by a monitoring device M21, A method for determining the communication path between the monitoring device M21 and the management device C. In addition, the method for determining the communication path may be implemented only when a pumping device, a monitoring device, or an advanced device is newly installed in the factory F, for example, except when the new monitoring system 1 is adopted in the factory F or the like.

FIG. 3 is a flowchart showing an example of a method of determining a communication path in the monitoring system 1 according to an embodiment of the present disclosure. When the method is implemented in response to a request from the management device C, etc., as shown in FIG. 3 , first, a designated wireless communication signal is transmitted from one monitoring device M21 to all upper-level devices within the communicable range of the monitoring device M21 (step S11). In the present embodiment, as shown in FIG. 2 , since there are two high-level devices G1 and G2 within the communication range of the monitoring device M21, the monitoring device M21 transmits a designated wireless communication signal to these high-level devices G1 and G2 SG1 , SG2 , and the upper-level devices G1 , G2 respectively receive the designated wireless communication signals SG1 , SG2 transmitted from the monitoring device M21 (step S12 ). The specific information contained in the designated wireless communication signals SG1 and SG2 has been described above as an example, and therefore, the description is omitted here. In addition, it is preferable to use the wireless communication signals SG1 and SG2 transmitted to the plurality of upper-level devices G1 and G2 as a common signal, which is easier to describe later.

Next, in each upper-level device G1, G2 that receives the designated wireless communication signal transmitted from the monitoring device M21, the wireless state information of the received designated wireless communication signal is acquired (step S13). Here, the wireless state information is at least one of the radio wave strength of the wireless communication signal and the stability of the wireless communication signal, and preferably can include both.

The wireless state information obtained in each of the upper-level machines G1 and G2 is transmitted to the management device C through the network interfaces 23 and 33 and through the network NW (step S14 ). Then, by comparing the wireless state information collected between one monitoring device M21 of the management device C and each of the upper-level machines G1, G2, a monitoring device M21 and an optimal monitoring device M21 for communication with the one monitoring device M21 are selected. order machine (step S15). The selection can also be automatically selected by the selection unit 43 by comparing the magnitude relationship of the radio wave strength value and/or the stability value included in the wireless status information transmitted from the respective upper-level machines G1 and G2, or by The administrator AD confirms these values, selects them manually, or combines them.

In the management device C, when a monitoring device M21 and a high-level machine (eg, the high-level machine G2) are selected for the one monitoring device M21, the management device C associates the selected result with a unique address that can be specified by the monitoring device M21. For example, an upper-level machine G2 is returned together with other information (step S16 ). Then, the upper-level machine G2 that has received the selection result establishes communication with a monitoring device M21 based on the selection result (step S17). Through the above-mentioned series of steps, the communication path of the state quantity information signal transmitted from one monitoring device M21 to the management device C via one upper-level machine G2 is determined. In addition, a method of establishing communication (hereinafter, also referred to as "pairing") between the monitoring device and the upper-level device, for example, is stored in the memories 15 and 34 of the monitoring device M21 and the upper-level device G2. The target upper-level device information, the received monitoring device information, or the key information used for communication, etc., can be set by adding or referring to the information to communicate through a specific communication path when performing wireless communication.

When the above-mentioned process is performed for all the monitoring devices in which a plurality of upper-level machines exist within the communicable distance, the communication paths of all the monitoring devices M11 to Mn2 in the factory F are determined. Thereby, the state quantity information signals transmitted from the monitoring devices M11 to Mn2 are always transmitted to the management device C through one communication path, so that the communication load and communication cost can be suppressed, and the data management in the management device C can be facilitated.

FIG. 4 is a flowchart showing an example of an abnormality detection method in the monitoring system 1 according to an embodiment of the present disclosure. As shown in FIG. 4 , in the monitoring system 1 of the present embodiment, in the management device C, after the above-mentioned communication path is determined, the following steps are carried out to detect the abnormality of the pumping devices P1 to Pn. In addition, the following description describes the case where the abnormality is detected as all the pumping devices P1 to Pn in the factory F, but only a specific pumping device may be the abnormality detection target.

When an abnormality is detected in the monitoring system 1 of the present embodiment, first, whether it is the pump device P1 in the factory F is detected by the elapse of a preset time, or by an input action from the administrator AD, or the like The detection time of the state quantity of ~Pn (step S21). Then, when the detection time of the state quantity is detected (Yes in step S21 ), a request for obtaining the state quantity is transmitted from the management device C or the upper-level devices G1 to Gm to each of the monitoring devices M11 to Mn2 , or based on Each of the monitoring devices M11 to Mn2 has a timer function and the like not shown, but each of the monitoring devices M11 to Mn2 transmits a state quantity information signal to one of the paired upper-level devices in advance (step S22 ). For example, in step S22 of the monitoring device M21 having determined the communication path through the process shown in FIG. 3, in step S15, the state quantity information signal is only transmitted to the selected upper-level machine, that is, the upper-level machine G2, but not to the upper-level machine G2. The other upper-level machine G1 that exists within the communicable range. In addition, the state quantity data included in the state quantity information signal transmitted at this time can also be in the sensing part 14, and the plurality of state quantity data detected and stored in the memory 15 during a specified period can also be only sensed The state quantity data detected by the measuring unit 14 in real time. In addition, in the state quantity information signal transmitted at this time, in addition to the state quantity data, it is advisable to include the unique address of the monitoring device that detects the state quantity, the relevant information of an upper-level machine that is the object of transmission, or the monitoring device has been set up. Information on the pumping device of the device, etc.

Next, the upper-level machines G1 to Gm that have received the state quantity information signals transmitted from the monitoring devices M11 to Mn2 transmit the state quantity information signals to the management device C using the network interfaces 23 and 33 (step S23 ). Then, the management device C, which has received the state quantity information signals transmitted from the plurality of upper-level machines G1 to Gm, refers to the state quantity information signals received in the past as necessary, and sends the state quantity information signals to the abnormality detection unit 44 . During the analysis, it is determined whether there is an abnormality (step S24).

As described above, in the monitoring system 1 of the present embodiment, since the communication paths from the monitoring devices M11 to Mn2 to the management device C are determined as described above, the state quantity information signal from one monitoring device is transmitted through one communication path. Therefore, since the data collected in the management device C do not contain the same information, there is no need to check the duplication of the collected data, and the data management is easy.

Furthermore, in the factory F to which the above-mentioned monitoring system 1 is applied, the layout of the machinery is usually changed or the machinery is replaced due to the change of the manufactured products or the deterioration of the machinery. In particular, when the layout of the machine is changed, the positional relationship between the monitoring device and the upper-level machine may be changed, or an obstacle may be installed between the monitoring device and the upper-level machine. In this case, of course, the communication state between the monitoring device and the upper-level device will change, so it is better to reset the communication path. Therefore, in the communication path determination method of the monitoring system 1 of the present disclosure, in addition to the above-mentioned steps, it is preferable to optionally include the monitoring device C or any upper-level device receiving the monitoring of the selected one after the pairing is performed. Steps for re-selection of a monitoring device and an upper-level device (refer to Fig. 3) when the re-selection of a device and an upper-level device is instructed. By having such a procedure, the determined communication path can be easily changed, and the change of the communication environment can be flexibly responded to.

In addition, the re-selection instruction as a trigger (Trigger) for executing the above-mentioned re-selection step may be based on an input action of the administrator AD or the like, or the management device C or the like may automatically determine the timing of the re-selection instruction. When the management device C automatically determines the timing of the re-selection instruction, it is preferable that the upper-level devices G1 to Gm periodically grasp the communication status with all the monitoring devices M11 to Mn2 within the communicable range (including those not yet paired). Therefore, even after the communication path is determined, it is advisable to periodically transmit and receive wireless communication signals between each upper-level machine and all monitoring devices within its communicable range. In this case, it is preferable to use a signal with a small amount of data as the wireless communication signal to be transmitted and received, in particular, to avoid an increase in the load of the control unit on the upper-stage machine side.

The present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present disclosure. And all of these are included in the technical idea of the present disclosure.

All documents including the publications, patent applications and patents cited in this specification will be specifically displayed and incorporated by reference. In addition, all the contents are the same as those described here, and are here for reference. and included.

The nouns used in relation to the description of the present invention (especially in relation to the following patent application scope) and the use of the same descriptive terms may be interpreted as and in both the singular and the plural. The sentences "have", "have", "include" and "include" are interpreted as open end time (that is, "not limited to including ~") unless otherwise specified. Statements of numerical ranges in this specification, unless otherwise specifically indicated in the specification, are merely meant to serve as a shorthand for referring individually to each value that falls within its range, each value being incorporated into the specification by way of separate enumeration in this specification middle. All the methods described in this specification can be performed in all appropriate order unless otherwise specified in this specification or clearly contradicting the context. All examples or illustrative terms (such as “etc.”) used in this specification are only intended to better describe the present invention, and do not limit the scope of the present invention, unless otherwise specified. Nothing in the specification should be construed as construing an element not recited in the scope of the claim as essential in the practice of the invention.

The present specification includes the best modes known to the inventors of the present invention in order to implement the present invention, and describes suitable embodiments of the present invention. Modifications of these suitable embodiments should be apparent to those skilled in the art upon reading the above description. The inventors of the present invention expect those skilled in the art to appropriately apply such modifications, and intend to implement the present invention by methods other than those specifically described in this specification. Therefore, the present invention includes all modifications and equivalents of the contents described in the scope of claims appended to this specification as permitted by applicable law. Furthermore, unless otherwise specified in this specification, or if it is obviously inconsistent with the context, any combination of the above-mentioned elements in all the modified examples is also included in the present invention.

1: Monitoring system 10: Pump body 11: Motor 12: Controller 13: Wireless Communication Department 14: Sensing part 15: Memory 21, 31: Wireless Communications Department 22, 32: Control Department 23, 33: Web Interface 24, 34: Memory 25, 35: Communication Status Information Acquisition Department 26, 36: State Quantity Information Acquisition Department 41: Operation module 42: Storage area 43: Selected Department 44: Anomaly Detection Department AD: Administrator C: management device F: Factory G1～Gm: Advanced machine M11～Mn2: Monitoring device P1～Pn: Pumping device SG1, SG2: Wireless communication signal TD: terminal device

FIG. 1 is a schematic diagram showing an example of a monitoring system according to an embodiment of the present disclosure. FIG. 2 is a schematic block diagram showing an example of a part of a monitoring system according to an embodiment of the present disclosure. 3 is a flowchart showing an example of a method for determining a communication path in the monitoring system according to an embodiment of the present disclosure. FIG. 4 is a flowchart showing an example of an abnormality detection method in the monitoring system according to an embodiment of the present disclosure.

Claims (5)

A method for determining a communication path in a monitoring system, comprising the following steps: From one or a plurality of monitoring devices installed in the rotating machine and detecting the state quantity of the rotating machine, to a plurality of upper-level devices that can wirelessly communicate with the one or more monitoring devices, at least a message including a specific transmitting end is transmitted. The wireless communication signal of the specified strength of the information of the aforesaid one or more monitoring devices; Obtaining the communication status information of the received wireless communication signal in the plurality of upper-level machines respectively; and Selecting one monitoring device among the one or more monitoring devices according to the communication state information respectively obtained by the plurality of upper-level machines, and obtaining an upper-level machine that includes the information of the state quantity detected by the one monitoring device . The method for determining a communication path in a monitoring system according to claim 1, wherein the communication state information includes the radio wave strength and stability of the wireless communication signal. The method for determining a communication path in a monitoring system according to claim 1, wherein the one monitoring device transmits the information including the state quantity only to the one upper-level machine. The method for determining a communication path in a monitoring system as claimed in any one of claims 1 to 3, further comprising the steps: When a management device that can communicate with the plurality of upper-level machines or any one of the plurality of upper-order machines has received a re-selection instruction for the selected one of the monitoring devices and the aforesaid one upper-order machine , and re-select the aforementioned one monitoring device and the aforementioned one upper-level machine. A monitoring system is provided with: One or more monitoring devices, which are installed in one or more rotating machines to detect the state quantities of the aforementioned one or more rotating machines; The plurality of high-level devices are capable of wirelessly communicating with the one or more monitoring devices, and include a communication state information acquisition unit that obtains communication during the wireless communication with the one or more monitoring devices status information; and The management device obtains and manages the information including the state quantities of the one or a plurality of rotating machines from the plurality of upper-level machines, and includes a selection unit, and the selection unit is based on the plurality of upper-level machines, respectively The communication state information obtained by the communication state information acquisition unit during wireless communication with one of the one or more monitoring devices, selects the one monitoring device, and obtains the state including the state detected by the one monitoring device A high-level machine for the amount of information.

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