JP2004290774A - Remote monitoring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a remote monitoring system which can exactly offer situation information such as normality/abnormality of a user's plant under operation to a user. <P>SOLUTION: As essential constituents, the remote monitoring system has an operation data reception section for receiving plant operation data transmitted from a plurality of user's plants a, b, c, ... each of which is composed of an electronic circuit, is intensively managed and is under service contract, by utilizing a communication channel of NTT or the like and storing the plant operation data in an operation data storing device, an arithmetic parameter storing device which stores parameters of each plant and arithmetic systems of each kind, a performance index arithmetic section which calculates a specific performance index and computes its usual extent, an extraction analysis section which sets up normal extent and performs situation judging based on data of each user's plant and a served data editing and transmitting section which edits maintenance information answering the user's request to a form corresponding to the contract and transmits it to the user. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement of a remote monitoring system for providing maintenance services for water and sewage treatment facilities, waste treatment facilities, and the like.
[0002]
[Prior art]
2. Description of the Related Art For maintenance of water and sewage treatment facilities, waste treatment facilities, and the like distributed throughout the country, a system has been developed that collects operating information of a specific device and centrally manages the information. For example, collect the operation measurement data of the membrane filtration device of the user who signed the maintenance service contract, and refer to the correlation data stored in advance in the computer of the central monitoring center to determine the operation status of the membrane filtration device and the properties of the activated sludge. There is known a service system in which it is determined whether or not the membrane cartridge needs to be replaced, and a new or regenerated membrane cartridge is delivered. (See Patent Document 1)
[0003]
[Patent Document 1]
JP-A-2002-58970: Claim 1
[0004]
The correlation data stored in the computer as a reference for evaluating the measurement data, the correlation between the filtration pressure, the amount of permeated water, and the like, the operating state of the membrane filtration device, and the properties of the activated sludge were determined in advance based on empirical rules. Was something. This means that an empirical rule representing the state of the equipment is required, and that a threshold value needs to be set.
[0005]
These empirical rules and thresholds are obtained from chemical engineering calculations and experimental data, but they are not necessarily based on the actual data of actual machines and may be rarely reviewed. There was a problem that the user could not judge.
In addition, there is a problem that since the determination of the state is performed only for a moment, the tendency and the degree of badness cannot be recognized.
[0006]
In a distributed control system DCS or the like that can be applied to such individual management, there is a function of displaying the best data in a batch graph for reference by using a trend graph function (batch trend) using a start trigger as a start trigger in a batch operation facility. Also in this case, past data of the own plant can only be referred to, and long-term trend data such as clogging of the membrane element cannot be obtained.
[0007]
[Problems to be solved by the invention]
The present invention has been made in order to solve the above problems, and provides a remote monitoring system capable of accurately providing a user with status information such as the normal / abnormal state of an operating user plant.
[0008]
[Means for Solving the Problems]
The above-described problem involves collecting operation data of similar plants from a plurality of user plants, calculating and calculating a value of a performance index selected in advance based on the operation data, and allowing the performance index to be permitted. After setting the normal range, the remote monitoring system according to the present invention is characterized in that a plant deviating from the normal range is extracted and the result is provided to the user as maintenance information.
[0009]
Further, in the present invention, the performance index is a form in which the converted permeation flux in the membrane filtration device, the amount of fluidized sand retained in the fluidized bed incinerator, and the individual treatment installed in the sewage treatment facility or the waste treatment facility. The present invention is embodied in a form in which one or more of power consumption, chemical consumption, fuel consumption, the number of alarms, generated power, and processing efficiency in the device are used. Further, it is preferable that steps after the collection of the plant operation data are performed by a centralized computer system.
[0010]
In addition, the normal range in which the performance index is allowed is compared or grouped with respect to values of a plurality of similar plants, the least squares method, a statistical method using standard deviation, a multivariate data analysis method, and a fuzzy, neural network, etc. The present invention can be embodied in a mode that is set using one or two or more types of pattern recognition methods. Further, it is preferable that the maintenance information to be provided includes the operation information of a similar plant owned by another user, and that the steps after the collection of the operation data are performed by a centralized computer system.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of a remote monitoring system according to the present invention will be described with reference to FIGS.
In the remote monitoring system of the present invention, in the block diagram of FIG. 1, the operation data receiving unit, the performance index calculating unit, the extracting / analyzing unit, and the provided data editing / transmitting unit, which are each composed of an electronic circuit and centrally managed, are indispensable. The components are described below in detail.
[0012]
(Operation data receiving section)
The operation data collection unit transmits plant operation data from a plurality of users' plants a, b, c,... X under a service contract using a communication line such as NTT, and the data is stored in an operation data storage device. Will be saved. In this case, the operation data is stored for each user plant.
[0013]
As an example of the operation data, in the case of a membrane filtration device, for example, an overflow (m ³ / d), a membrane area (m ² ), a membrane differential pressure (MPa), Primary data such as raw water temperature (° C) correspond. The operation data is not limited to such primary data, and may be secondary data processed on the user plant side.
[0014]
In addition, the collection and storage of the operation data are performed by setting in advance the collection timing such as the operation elapsed time and the collection form such as the collection cycle, depending on the type of the target plant and the nature of the data to be collected. In addition, similar plant codes and attribute information of the target plant, such as whether or not information can be disclosed to other users based on the user's approval, are registered as operation parameters, and if a similar plant is specified based on this, the subsequent steps will be performed. The extraction process becomes easier.
[0015]
The similar plant refers to a plant that can calculate and compare the same performance index, such as a reduced permeation flux in a membrane filtration device and a retained amount of fluidized sand in a fluidized bed incinerator. “Similar plant” is classified and coded in advance, and a “similar plant code” and a list of data names required for calculating a performance index are registered as attribute information for each plant. It is also conceivable that a certain plant belongs to a plurality of “similar plants”.
[0016]
(Performance index calculation unit)
Next, based on the collected plant operation data, a value of a pre-selected performance index is calculated and calculated for a similar plant, and an allowable normal range is set for the performance index.
[0017]
First, a specific performance index is selected for similar plants that have been grouped in advance as described above, and the operation data stored in the operation data storage device is called to calculate and calculate. In this case, the calculation formula of the performance index, necessary constants, calculation procedure, and the like are stored in a calculation parameter storage device, and are recalled and used as needed. In addition, the operation parameter storage device stores in advance standard operation conditions or set values of each plant, equipment, and equipment used to supplement the operation data of each plant, or specification data of each equipment. ing.
[0018]
Next, an example of a reduced permeation flux suitable for evaluating and comparing the performance of the membrane filtration device will be described as a performance index. The converted permeation flux (m / day) is, as shown in the following equation (1), the filtration flow rate (m ³ / m) collected from each user's plant a, b, c, d,. d), a value calculated from the membrane differential pressure (MPa), the raw water temperature (° C.), and the membrane area (m ² ) which is a parameter for each plant, and is calculated individually for each plant.
{Filtration flow rate (m ³ / d) / membrane area (m ² )} × 0.098 (MPa) / [membrane differential pressure (MPa) × {1−0.02 (1 / ° C.) × (25-raw water temperature) ℃)｝] (Equation 1)
[0019]
The operation data for calculating a certain performance index is not limited to the case where the operation data itself sent from each plant is used, and depending on the content of the performance index, the original data is processed as primary data. Needless to say, secondary data and tertiary data can also be used.
[0020]
In a fluidized bed incinerator, the amount of sand layer during operation is an index that greatly affects incineration performance, but it cannot be directly measured and it is difficult to quantify the best condition. However, when converted by a similar expression of the converted permeation flux of the above-mentioned membrane filtration device, comparison can be made between other plants.
[0021]
(Extraction analysis unit)
Next, a normal range is obtained for the performance index as follows. The normal range is a range for evaluating whether or not the performance index value of a specific plant is within the range of the same level as other plants, based on the calculated distribution state of the performance index value of each plant. It is a numerical value shown. That is, if the performance index value of a specific plant is within the normal range, it can be evaluated as a normal state because it is at the same level as other plants, and if it deviates, it can be evaluated as an abnormal state (it may be excellent).
[0022]
In order to set the normal range, a known statistical method using a least squares method and a standard deviation in addition to the fixed value of the conventional technology, a multivariate data analysis method, a pattern recognition method using fuzzy, a neural network, and the like are appropriately used. It is possible.
[0023]
In the present invention, the performance index is used as described above. As the performance index, the above-described primary data itself can be used. However, a content suitable for displaying the operation state of each plant is used. It is preferred to choose. For example, the reduced permeation flux in a membrane filtration device and the amount of fluidized sand retained in a fluidized bed incinerator are mentioned.
In addition, it was selected according to the purpose from electric power consumption, chemical consumption, fuel consumption, number of alarms, generated power, treatment efficiency, etc. in individual treatment equipment installed in water and sewage treatment facilities or waste treatment facilities. One or more kinds can be used.
[0024]
(Editing and sending section of provided data)
Next, the data of each user plant is displayed on the screen, and the relationship with the normal range is displayed. A display image is shown in the extraction analysis unit of FIG. In FIG. 1, the reduced permeation flux is taken as the specified performance evaluation, the calculated reduced permeation flux Y and the operation time X are graphed on a screen, the position of each plant is indicated by □, and the normal range is indicated by a chain line. This is an example displayed by. Further, the plants that deviate from the normal range are indicated by ○ for plants d that deviate upward and by • for plants j that deviate downward, to facilitate understanding.
[0025]
As a specific method, a method of generating an image file based on data and a method of generating text data including drawing information like SVG (Scalable Vector Graphics) can be considered. This allows the user to use only general-purpose software such as an Internet browser, and the maintenance of the system can be performed only with the server.
[0026]
Thus, the plant d and the plant j that deviate from the normal range can be extracted, and the operating status of each of the other plants can be displayed on the screen. In editing the provided data, in addition to graphing as described above, in addition to displaying in a list and displaying as text data, various types of display according to the purpose of use are possible.
[0027]
FIG. 2 is a graph of the situation with respect to the processing amount X, similarly using the power / processing amount Y in the membrane filtration device as a performance index, and the operating state of each user plant can be grasped in the same manner as in the previous case. is there.
[0028]
The operation status data of each plant obtained as described above is provided to the user as maintenance information according to the user's request. In this case, "The reduced permeation flux of plant ○ is XX. Please perform cleaning.""The reduced permeation flux of plant ○ is XX, which is below XX in the normal range. From the level that provides only a simple advice message such as "Immediate action is required." As shown in the graph of the converted permeation flux Y with respect to the operating time X in FIG. Thus, a so-called normal / abnormal information service comprising the position display of the user plant is provided.
[0029]
Further, an information service that discloses all data of similar plants owned by other users can be provided. For example, when all the performance index data of the plants a to k illustrated in FIG. 1 are disclosed, it is expected that the user will be able to compare the owned facilities with others. In any case, it is needless to say that the display data is edited in a predetermined format such as masking the display data based on the approval (disclosure permission information) of each user and making it impossible to specify a user name other than the user. When editing the provided data, the validity of the provided data is automatically added, such as automatically adding information such as advice and suggestions for improvement measures, and manually adding comments by the veteran designer to each user or to the entire user. Is also preferred.
[0030]
The maintenance information edited in this way is transmitted to the user by an appropriate means. It can be said that the Internet is the most suitable as the transmitting means, because the Internet has less restrictions and costs when receiving.
[0031]
Next, advantages of the present invention will be described together.
(1) The first feature is that it is not necessary to determine a threshold value for a specific performance index based on an empirical rule unlike a conventional system. The propriety of the operation state can be evaluated from comparison with individual performance index values calculated based on operation data sent from similar grouped plants.
[0032]
(2) In the present invention, a specific plant that deviates from the normal range for each performance index can be extracted. However, it is possible to evaluate two types of plants that deviate in a preferable direction and those that deviate in an unfavorable direction. . In addition, there is an advantage that it can be used in various aspects such as being able to rank and evaluate the performance of each plant, and to be used for rank evaluation of each plant supplier.
[0033]
{Circle over (3)} The main steps of the present invention can be processed in a computer that is centrally and centrally managed, so that it is easy to improve and correct the calculation software, and to be able to respond immediately to changes in the operation data collection conditions. Advantages are obtained, such as superior security because the original data is not output to the outside, and centralized management, so that the total system cost can be significantly reduced as compared to individual management.
[0034]
(4) It is possible to provide useful evaluation data to the user in the form of various display data, and to assist the user in understanding and grasping the operational position of the plant owned by the user. Furthermore, by providing expert comments and advice from plant manufacturers, it is possible to provide detailed services to users. Such maintenance services can be executed in the form of regular reports such as daily, weekly, monthly, etc., and with the consent of the user, mutually disclose data to improve the accuracy and usefulness of the service. There are also advantages such as being able to.
[0035]
【The invention's effect】
Since the remote monitoring system of the present invention is configured as described above, without using a threshold based on an empirical rule, it is possible to accurately confirm the operation status by comparing similar plants, ranking between plants is also possible, There is an excellent effect that the system cost is low, the security is excellent, and a fine-grained maintenance service according to the user's needs becomes possible. Therefore, the present invention has a very large technical value as a remote monitoring system that solves the conventional problems.
[Brief description of the drawings]
FIG. 1 is a functional block diagram for explaining an embodiment of the present invention.
FIG. 2 is a graph for explaining an example of a provided data screen.
FIG. 3 is a graph for explaining an example of another provided data screen.

Claims (6)

The operation data of similar plants was collected from a plurality of user plants, and based on the operation data, the value of the performance index selected in advance was calculated and calculated, and an allowable normal range was set for the performance index. A remote monitoring system characterized by extracting a plant deviating from the normal range and providing the result to a user as maintenance information. The remote monitoring system according to claim 1, wherein the performance index is a reduced permeation flux in the membrane filtration device, and a retained amount of the fluidized sand in the fluidized bed incinerator. Performance index is one or two of power consumption, chemical consumption, fuel consumption, number of alarms, generated power, and treatment efficiency of individual treatment equipment installed in water and wastewater treatment facilities or waste treatment facilities. The remote monitoring system according to claim 1, which is as described above. The normal range in which the performance index is allowed is compared or grouped for values of a plurality of similar plants, and a method of least squares, a statistical method using standard deviation, a multivariate data analysis method, and pattern recognition by fuzzy, neural network, etc. The remote monitoring system according to claim 1, wherein the setting is performed using one or more methods. The remote monitoring system according to claim 1, wherein the provided maintenance information includes operation information of a similar plant owned by another user. The remote monitoring system according to any one of claims 1 to 5, wherein steps after the collection of the operation data are performed by a centralized computer system.

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