JP6409325B2 - Equipment management system - Google Patents

Description

  The present invention relates to a facility management system suitable for centrally managing the operating state of a water treatment facility in a management center, and more particularly to a facility management system that can easily calibrate various sensors that measure the status of devices constituting the water treatment facility.

  In water treatment facilities such as cooling water or boiler water treatment facilities, slimes and scales are generated in the pipes due to various impurities contained in the treated water, and the salt ion concentration in the treated water increases. Sometimes. Therefore, conventionally, water treatment chemicals such as a scale remover have been appropriately injected into the water treatment target water system according to the operation status of the water treatment facility. In addition, the chemical injection is automatically controlled according to information such as water quality required by various sensors incorporated in the water treatment facility.

  In addition, in order to monitor the operation state of such a water treatment facility, information on the water quality obtained as described above and information indicating the operation (control) state of the facility equipment are displayed on the operation unit (control panel) of the water treatment facility. Display on a display device provided in (1).

  For example, Patent Document 1 includes a facility for performing a predetermined process on an object to be processed, for example, a water treatment facility composed of a cooling water system or a boiler water system, and a management center that manages the operating state of the facility. Collecting information indicating the operating status of the equipment and monitoring the operating status of the equipment (operating status monitoring means), obtaining the analysis result of the treated object such as treated water collected from the equipment, and obtaining the equipment (Operation state analysis means), and further create information useful for operating the facility according to the operation state of the facility obtained by the monitoring and analysis and reference information stored in the database in advance. An equipment management system (information presenting means) provided to the equipment side is disclosed.

  In addition, in Patent Document 2, in the facility management system as disclosed in Patent Document 1, the measurement result obtained by sensing the water treatment facility is transmitted to and stored in the management center through a communication line. A data collection device that does not cause data loss even when a communication line abnormality occurs is disclosed.

Japanese Patent No. 3624941 JP 2007-87117 A

  However, in a system that measures the water treatment status of a water treatment facility with a sensor and collects and accumulates the measured data, as in the facility management systems described in Patent Document 1 and Patent Document 2, the sensor or data collection Measurement data may gradually deviate from actual values due to performance changes such as deterioration of the data collection equipment used (AD (analog-digital) converters, isolators, distributors, etc.). As a countermeasure, calibration work by adjusting parameters of sensors and data collection equipment is currently performed on site, but since calibration operations differ depending on the sensor and equipment, complicated and difficult work is required. There is a problem that correct equipment management may not be possible due to continued calibration errors and uncalibrated conditions.

  An object of the present invention is to provide an equipment management system capable of maintaining the accuracy of data collected and stored by solving such problems and facilitating periodic sensor calibration. And

  In order to solve the above-mentioned problems, the present invention measures the state of the apparatus of a water treatment facility consisting of a plurality of apparatuses or the state of water in the apparatus with an existing sensor suitable for the apparatus, and the existing sensor Is a water treatment facility management system that performs centralized management via a communication line based on the measurement results of the device, and the calibration is performed by measuring the status of the device to be managed or the water status in the device with a calibrated sensor suitable for the device. Calibration data storage means for collecting and storing data, raw data storage means for collecting and storing raw data measured by the existing sensor, and correction of raw data from these calibration data and raw data Correction parameter calculation processing means for calculating a correction parameter of the correction data, and correction of the raw data using the correction parameter obtained by the correction parameter calculation processing means. And correcting means for, providing a facility management system characterized by comprising a calibration result data storing means for storing the corrected data corrected by said correcting means (invention 1).

According to this invention (Invention 1), the “raw data” measured by the existing sensor and the “calibration data” measured by the calibrated calibration sensor are centrally managed, and the raw data is based on these data. By calculating the “correction parameter” for correcting the image, and using the “correction data” obtained by correcting the “raw data” based on this “correction parameter”, it is easy to use regardless of the sensor or device. The calibration operation can be performed continuously, and by accumulating and using this “correction data”, the above calibration operation can be continued. Equipment management.

  In the said invention (invention 1), the said water treatment facility is a water treatment facility in a cooling water system or a boiler water system, a pure water and ultrapure water manufacturing apparatus, or a waste water treatment apparatus (invention 2).

  According to this invention (invention 2), these water treatment facilities can be accurately controlled.

  Furthermore, in the said invention (invention 1 and 2), it is preferable that the calculation process of the said correction parameter is based on the approximation of the quadratic function by the least squares method (invention 3).

  According to this invention (invention 3), it is possible to adapt to the case where the error increases as the output signal increases by using the approximation of the quadratic function by the least square method.

According to the facility management system of the present invention, each device of a water treatment facility comprising a plurality of devices or an existing sensor for measuring the state of water in the device is preliminarily calibrated and the water of each device of the same water treatment facility is measured. Or the water condition in the device is corrected based on the calibration data measured in parallel and the raw data, so existing sensors installed in the water treatment equipment can be easily calibrated. Water treatment facility management can be performed based on accurate data.

It is the schematic which shows the equipment management system which concerns on one Embodiment of this invention.

  Hereinafter, an equipment management system according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram showing an equipment management system according to an embodiment of the present invention. In FIG. 1, 1 is a management center as a water treatment facility management system, 2 is a water treatment facility to be managed consisting of a plurality of devices, and H is a worker for maintenance or the like. In this embodiment, a raw data measurement sensor 3 as a collection instrument for measuring the status of each device or the status of water in these devices is installed in advance in the devices constituting the water treatment facility 2. A time series measurement result (raw data) of the measurement sensor 3 is sent from a data collection device 4 such as a small PC via a communication line to a management center 1 provided at a location different from the site where the water treatment facility is provided. Configured to manage. In addition, the worker H brings a calibration sensor 5 as a calibration instrument that has been calibrated in advance, and the time-series measurement results (calibration data) of the calibration sensor 5 are also transmitted from the data collection device 4 to the communication line. Via the management center 1.

  The management center 1 includes an operation database 8 having raw data storage means 6 for collecting and storing the raw data and calibration data storage means 7 for collecting and storing calibration data, and the calibration data and raw data. Correction parameter calculation processing means 9 for calculating a correction parameter for correcting raw data from the time-series values, and correction for correcting raw data using the correction parameter group 10 obtained by the correction parameter calculation processing means 9 A processing unit 11 and an index database 13 having a calibration result data storage unit 12 for storing correction data (calibration result data) corrected by the correction processing unit 11 are provided. The accumulated data of the calibration result data accumulating means 12 is displayed as the detection result of the raw data measuring sensor on the monitor 14 provided in the vicinity of the water treatment facility. Note that reference numeral 15 denotes calibration basic information storage means for setting association information and data collection periods of raw data measurement sensors and calibration sensors in each device of the water treatment facility.

  In addition, the water treatment facility in the present embodiment can discharge (drainage / river) wastewater discharged from various factories, equipment for producing pure water and ultrapure water used in boilers, cooling water, various kinds of factories, and the like. Includes devices that purify to the level. In addition, there are no particular limitations on the plurality of devices constituting the water treatment facility 2 to be monitored, and it can be applied to various devices such as membrane treatment devices such as softening devices, iron removal devices, RO membrane devices, and ion exchange devices. It is.

  Next, the management method of the water treatment facility using the above-described facility management system will be described below.

(Measurement, collection and accumulation of raw data)
As a precondition, the status of each device of the water treatment facility 2 composed of a plurality of devices or the status of water in the devices is measured by raw data measuring sensors 3 installed in these devices. The raw data measured by this raw data measuring sensor is transmitted from the data collection device 4 to the management center 1 via a communication line, and continuously stored in the raw data storage means 6 of the operation database 8 in time series. . As a data collection / accumulation method in the data collection device 4, a method in which data is not lost even if a communication line is defective is preferable. For example, a method described in Japanese Patent Application Laid-Open No. 2007-87117 can be applied. it can. The raw data measurement sensor 3 may change in performance such as deterioration due to long-term use, and measurement data may gradually deviate from actual values.

(Measurement / collection / accumulation of calibration data)
Therefore, the maintenance worker H periodically visits the water treatment facility 2 and inspects the state of the apparatus or the state of water in the apparatus under the same conditions as the raw data measurement sensor 3. Specifically, the worker H brings a calibration sensor 5 that has been calibrated in advance, and with this calibration sensor 5, the status of the device to be managed or the status of water in the device is the same as the raw data measurement sensor 3. Measurement is performed under conditions, and the measured calibration data is transmitted from the data collection device 4 to the management center 1 via the communication line, and stored in the calibration data storage means 7 of the operation database 8 in time series.

(Analysis of raw data)
When the calibration data is collected in this manner, the period of the calibration data to be monitored, the data item number of the calibration target, as basic calibration information from the calibration basic information storage means 15 by a personal digital assistant (PDA) or the like. (Tag number), specify the configuration target. Subsequently, the correction parameter calculation processing means 9 is activated to start correction parameter calculation processing for correcting the raw data from the calibration data value and the raw data value.

The correction parameter calculation processing in the correction parameter calculation processing means 9 is such that when the set of calibration data is Y and the set of raw data is X, the calibration data at the calibration data accumulation start time t1 is y1, the raw data Data is x1, data at time t2 is y2, x2,... Ti data is ii, xi,..., Calibration data is accumulated at time tn yn, What is necessary is just to obtain | require the function f used as yi = f (xi) when it is set to xn. Here, calculation method of obtaining the function f is not particularly limited, since it can be adapted also to a case where error increases as the output signal increases, that calculates the quadratic function f (x) = a1 + a2x + a3x 2 Formula preferable.

  The least square method can be applied to the approximation of the above-described quadratic function. Specifically, the parameters a1, a2, and a3 may be obtained using the following formula 1.

(Correction of raw data and provision of information)
The parameters a1, a2, and a3 obtained by the correction parameter calculation process are stored for each measurement item, and data for determining whether to perform correction can be stored for each measurement item. Then, using this correction parameter, the correction processing means 11 corrects the measured raw data and transfers the newly accumulated data group 10 to the calibration result data accumulation means 15 of the index database 13. At the time of transfer, the switch determination data is checked to determine whether or not correction is to be performed. The result is obtained and stored in the index database 13. Subsequent index calculation, storage in the form, and output of the Web screen to the monitor 14 may all be performed based on the correction data stored in the index database 13. When there is almost no difference between the measurement result of the raw data measurement sensor 3 and the measurement result of the calibration sensor 5, an instruction not to perform correction may be issued by a personal digital assistant (PDA) or the like. Such calibration of the raw data measuring sensor 3 may be performed periodically, for example, once a month.

In this way, an easy to calibrate the sensor installed in the water treatment facility on the basis of accurate data, it is possible to perform water treatment facility management.

  Although the present embodiment has been described with reference to FIG. 1, the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention. For example, with respect to the water treatment apparatus constituting the water treatment facility 2 managed by the management center 1, a plurality of apparatuses can be managed simultaneously by applying optimum sensors to a plurality of different types of apparatuses. Then, the management center 1 collects information indicating the operation information from each of the water treatment facilities 2 via the communication line and indicates the operation information on the monitor 14, etc., and individually determines the operation state of each device of the water treatment facility 2. Or it can manage comprehensively.

The equipment management system of the present invention, to calibrate the existing sensor placed in the apparatus of water treatment equipment by a simple operation can be carried out water treatment facility management, capable of managing high precision water treatment facilities It becomes possible to provide a management system for water treatment facilities.

1 ... Management center (water treatment facility management system)
2 ... Water treatment facility 3 ... Raw data measurement sensor 4 ... Data collection device 5 ... Calibration sensor 6 ... Raw data storage means 7 ... Calibration data storage means 8 ... Operation database 9 ... Correction parameter calculation processing means 10 ... Correction parameter group 11 ... Correction processing means 12 ... Calibration result data storage means 13 ... Index database 14 ... Monitor 15 ... Basic information storage means for calibration

Claims (3)

Measure the status of the water treatment facility consisting of a plurality of devices or the status of water in the devices with existing sensors suitable for the devices, and perform centralized management via a communication line based on the measurement results of the existing sensors. A water treatment facility management system
Calibration data storage means for collecting and storing calibration data measured by a calibrated sensor suitable for the status of the device to be managed or the status of water in the device;
Raw data storage means for collecting and storing raw data measured by the existing sensor;
Correction parameter calculation processing means for calculating a correction parameter for correcting the raw data from the calibration data and the raw data,
Correction processing means for correcting the raw data using the correction parameter obtained by the correction parameter calculation processing means;
A facility management system comprising calibration result data storage means for storing correction data corrected by the correction processing means.   The facility management system according to claim 1, wherein the water treatment facility is a water treatment facility in a cooling water system or a boiler water system, a pure water / ultra pure water production apparatus, or a waste water treatment apparatus.   The facility management system according to claim 1, wherein the calculation processing of the correction parameter is based on approximation of a quadratic function by a least square method.

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