JP2011187022A - Abnormality monitoring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To find an abnormality of each facility of a water and sewage plant. <P>SOLUTION: This abnormality monitoring system 10 includes: an oscillating power generation element which is attached to the facility of the water and sewage plant 1 to convert the oscillation of the facility into power; a power generation power input part 110 which acquires the power from the oscillating power generation element; an abnormality determination part 121 which compares a power value of the power acquired by the power generation power input part 110 with a power value of the facility in a normal time to determine the abnormality; an abnormality reporting part 122 which reports the abnormality when the abnormality of the facility is detected by an abnormality diagnostic part 121; and a power control part 130 which inputs the power acquired from the power generation power input part 110 in the facility of the water and sewage plant 1 or stores the power in an electricity storage part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an abnormality monitoring system that detects an abnormality of each facility of a water and sewage plant.

  In a water and sewage plant, appropriately maintaining each facility is very important in terms of providing a stable lifeline. In order to maintain equipment, for example, each equipment may be regularly inspected. In addition, the central monitoring and control device of the water and sewage plant may receive the numerical values of the instruments provided in each facility and maintain each facility. In this case, the person in charge of the equipment visits the equipment showing the abnormal value and checks the equipment. In water and sewage plants, equipment such as generators and pumps vibrate in daily operations due to movement of motors and the like. Therefore, the person in charge of equipment may check the equipment by measuring the sound and vibration of the equipment.

  Here, in order to diagnose abnormalities of various devices used in the plant, there is a method of measuring by attaching a sensor terminal to the device (for example, see Patent Document 1).

JP 2007-188425 A

  However, in a general water and sewage plant, in order to grasp the vibration of the equipment, it is necessary to go to the equipment. Since a waterworks plant purifies water taken from a river at a water purification plant and provides the water to each home or building, equipment used in such a plant is scattered in a wide range. It may be costly and time consuming for the person in charge of the facility to individually investigate the vibration status of the facility. Therefore, even if an abnormal vibration occurs due to an abnormality in equipment, it may be difficult to quickly grasp the situation.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an abnormality monitoring system that easily detects an abnormality of equipment in a water and sewage plant.

  In order to solve the above problems, a feature of the present invention relates to an abnormality monitoring system for detecting an abnormality in each facility of a water and sewage plant. An abnormality monitoring system according to a feature of the present invention is attached to a facility of a water and sewage plant, a vibration power generation element that converts vibration of the facility into electric power, a generated power input unit that acquires power from the vibration power generation element, and generated power Compare the power value of the power acquired by the input unit with the normal power value of the facility, and if an abnormality is detected by the abnormality determination unit and abnormality diagnosis unit And an abnormal reporting section for reporting. Here, it is preferable that the facility of the water and sewage plant is a facility that generates vibration.

  Moreover, you may further provide the electric power control part which inputs the electric power acquired from the generated power input part into the installation of a water and sewage plant, or accumulate | stores in an electrical storage part.

  ADVANTAGE OF THE INVENTION According to this invention, the abnormality monitoring system which detects the abnormality of an installation easily in a water and sewage plant can be provided.

FIG. 1 is a diagram for explaining a water and sewage plant in which an abnormality monitoring system according to an embodiment of the present invention is used. FIG. 2 is a diagram for explaining a part of the water supply plant according to the embodiment of the present invention. FIG. 3 is a diagram for explaining the abnormality monitoring system according to the embodiment of the present invention. FIG. 4 is a flowchart for explaining processing of the abnormality monitoring system according to the embodiment of the present invention. FIG. 5 is a diagram for explaining an abnormality in the abnormality monitoring system according to the embodiment of the present invention.

  Next, embodiments of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.

  The abnormality monitoring system 10 according to the embodiment of the present invention detects an abnormality in the water and sewage plant 1. First, the outline of the water and sewage plant 1 will be described with reference to FIG. The water and sewage plant 1 mainly includes a water supply plant 2 and a sewage plant 3.

  The waterworks plant 2 is a plant for supplying drinking water and other drinking water to households and buildings. The water supply plant 2 includes a water intake 21, a water purification plant 22, a pumping station 24, a distribution reservoir 25, and a water supply pipe network 26. The water supply pipe network 26 is a pipe for supplying the water of the distribution reservoir 25 to each household, each building, and the like. The water intake 21 draws water from the river 4 and supplies it to the water supply plant 2. In the waterworks plant 2, the water purification plant 22 purifies the water pumped up from the river 4 by sterilization and disinfection. The clean water purified at the water purification plant 22 is supplied to and accumulated in the distribution reservoir 25 by a pump installed at the pumping plant 24. The clean water accumulated in the distribution reservoir 25 is supplied to each household and each building via the water supply network 26.

  The sewage plant 3 is a plant that purifies sewage flowing from a kitchen / bathroom of a house, a factory, etc., and flows it into a river 4 or collects rainwater such as rain or snow and flows it into the river 4. A sewage treatment plant 31, a pumping plant 32, and a sewage pipe network 33 are provided. The sewage pipe network 33 is a pipe for collecting sewage and rainwater generated in each home and each building in the sewage treatment plant 31. The sewage pipe network 33 may be divided into a pipe network through which sewage flows and a pipe network through which rainwater flows, or may be together. In some cases, sewage and rainwater are collected in the sewage treatment plant 31 by the pump of the pumping plant 32.

  Next, a part of the waterworks plant 2 according to the embodiment of the present invention will be described in detail with reference to FIG. The water purification plant 22 includes a sedimentation basin 201, a filtration basin 202, a water purification basin 203, and a pump 204. In the sedimentation basin 201, water obtained by reacting water pumped up from the river 4 with a chemical such as polyaluminum chloride is stored. By this reaction, impurities such as turbidity contained in the water pumped up from the river 4 are aggregated into flocs. The floc is about several millimeters in size. This size is a size that tends to settle in the sedimentation basin 201. In the sedimentation basin 201, most of the charged chemicals and flocs settle and are collected as sludge. Thereafter, in the filtration basin 202, impurities that could not be removed by the sedimentation basin 201 are filtered with sand. At this time, sterilization in the water is killed by a chemical having a bleaching effect or a sterilizing effect, an ultraviolet lamp having a sterilizing effect, or the like and supplied to the water purification pond 203 in the process after the filter basin 202. The water stored in the clean water reservoir 203 is supplied to the distribution reservoir 25 via the pump 204, and is further supplied from the distribution reservoir 25 to each household and each building.

  Here, as shown in FIG. 2, in the water purification plant 22, a plurality of sedimentation basins 201 and filtration basins 202 may be provided, and water may be purified by a plurality of systems and supplied to the water purification basin 203. Moreover, the water supply system 2 may include a plurality of reservoirs 25. For example, purified water may be supplied from the distribution reservoir 25a to the distribution reservoir 25b and the distribution reservoir 25c using the pump 24a.

  Thus, the water and sewage plant 1 includes various facilities. In order to drive each of these facilities, a generator, an electric motor, and the like are provided. Furthermore, piping for supplying water is provided between each facility.

  The abnormality monitoring system 10 according to the embodiment of the present invention is used in such a water and sewage plant 1. Although not shown in FIGS. 1 and 2, the abnormality monitoring system 10 centrally manages information on instruments used in the water and sewage plant 1 and detects the occurrence of abnormality in the water and sewage plant 1. In particular, the abnormality monitoring system 10 according to the embodiment of the present invention detects an abnormality of a facility such as a generator, an electric motor, or a pipe of the water and sewage plant 1 that generates vibration.

  With reference to FIG. 3, the abnormality monitoring system 10 which concerns on embodiment of this invention is demonstrated. In the abnormality monitoring system 10 according to the embodiment of the present invention, vibration power generation elements 51, 52, and 53 are installed in equipment provided in the water and sewage plant 1. The electric power generated by each of the vibration power generation elements 51, 52 and 53 is input to the control device 100.

  The vibration power generation element is an element that generates electric power by vibration. Examples of the vibration power generation element include a piezoelectric type, an electromagnetic induction type, and an electrostatic induction type. Piezoelectric vibration power generation elements generate power by a potential difference generated when a material is deformed by vibration. The electromagnetic induction type vibration power generation element generates power by electromagnetic induction caused by vibration. The electrostatic induction type vibration power generation element generates power by electrostatic induction caused by vibration. The vibration power generation element used in the embodiment of the present invention does not matter by what type of power generation.

  The vibration power generation elements 51, 52, and 53 are installed in a facility that generates vibration. In the example shown in FIG. 3, the vibration power generation element 51 is installed in pumps such as the pumps 24a, 204a, and 204b. The vibration power generation element 52 is installed in the generator 200. The vibration power generation element 53 is installed in a pipe such as the pipes 26 and 33 described in FIG.

  The pump is used in the water and sewage plant 1 to supply water to the piping connecting the facilities. The pump is driven by an electric motor. In the example shown in FIG. 3, the vibration power generation elements 51a, 51b, 51c and the like are installed in the pumps 24a, 204a, 204b and the like described with reference to FIGS. Pumps 24a, 204a and 204b are driven by electric motors 241a, 241b and 241c, respectively.

  When the pumps 24a, 204a and 204b are driven, the electric motors 241a, 241b and 241c and the pumps 24a, 204a and 204b vibrate. Along with this, the vibration power generation element 51 installed in the pump also vibrates. The vibration power generation element 51 converts this vibration into electric power and inputs the electric power to the control device 100. In the example shown in FIG. 3, one vibration power generation element is installed in one pump. However, a plurality of vibration power generation elements may be installed in one pump, and a vibration power generation element is installed in an electric motor. May be. When the water and sewage plant 1 includes a plurality of pumps and electric motors, it is preferable to install a vibration power generation element in each pump and electric motor in order to be able to detect abnormality of each facility.

  The generator 200 generates electric power used in the facilities of the water and sewage plant 1. In the example shown in FIG. 3, the generator 200 is provided in a water treatment facility such as the water intake 21, the water purification plant 22, the pumping plant 24, the sewage treatment plant 31, or the pumping plant 32 described with reference to FIG. 1. Supply power to the equipment.

  When the generator 200 is driven, the generator vibrates and the vibration power generation element 52 installed in the generator 200 also vibrates. The vibration power generation element 52 converts this vibration into electric power and inputs it to the control device 100. In the example shown in FIG. 3, one vibration power generation element is installed in one generator, but a plurality of vibration power generation elements may be installed in one generator. When the water and sewage plant 1 includes a plurality of generators, it is preferable to install a vibration power generation element in each generator.

  The piping is used in the water and sewage plant 1 to supply water between the facilities. In the example shown in FIG. 3, the vibration power generation elements 53 a and 53 b are respectively installed in the pipe 26 of the water supply pipe network and the pipe 33 of the sewer pipe network 33 described with reference to FIG. 1.

  When water is supplied to the pipes 26 and 33, the pipe vibrates. The piping itself may vibrate, or the piping may vibrate when vibration of the pump 24 or the like connected to the piping is transmitted to the piping. As the pipes 26 and 33 vibrate, the vibration power generation element 53 installed in the pipe also vibrates. The vibration power generation element 53 converts this vibration into electric power and inputs it to the control device 100. One vibration power generation element may be installed in one pipe, or a plurality of vibration power generation elements may be installed. Moreover, it is preferable to install a vibration power generation element in each pipe of the water and sewage plant 1. Furthermore, it is preferable to install the vibration power generation element at a position closer to the pump on the pipe so that the vibration of the pump can be detected more easily.

  Next, the control device 100 in the abnormality monitoring system 10 of the present invention will be described with reference to FIG.

  The control device 100 includes a generated power input unit 110, an abnormality diagnosis unit 120, a power control unit 130, and a plant monitoring unit 190. Here, the plant monitoring unit 190 is a general water and sewage abnormality monitoring unit. For example, the plant monitoring unit 190 acquires the numerical values of the instruments provided in each facility of the water and sewage plant 1 and detects whether or not an abnormality has occurred.

  The generated power input unit 110 acquires power from each vibration power generation element installed in the facility of the water and sewage plant 1. The generated power input unit 110 inputs the acquired power to the power control unit 130. Furthermore, the generated power input unit 110 converts the acquired power into a power value, associates the identifier of the vibration power generation element from which the power is acquired, and the power value, and inputs the associated power value to the abnormality diagnosis unit 120.

  The abnormality diagnosis unit 120 includes an abnormality determination unit 121 and an abnormality report unit 122.

  The abnormality determining unit 121 determines an abnormality by comparing the power value of the power acquired by the generated power input unit 110 with the power value when the facility is normal. The abnormality determination unit 121 determines for each identifier of the vibration power generation element. Therefore, the abnormality determination unit 121 records sampling data of a normal power value for each identifier of the vibration power generation element.

  The abnormality determination unit 121 samples the power value sequentially acquired by the generated power input unit 110 and acquires the transition of the power value over time. Furthermore, the abnormality determination unit 121 determines that an abnormality has occurred when the difference between the acquired power value sampling and the acquired power value sampling is equal to or greater than a threshold value as compared with the normal power value sampling.

  For example, when the difference between the amplitude of the sampled power value and the normal amplitude is larger than a predetermined threshold, the abnormality determination unit 121 determines that the error is an amplitude error. Moreover, the abnormality determination part 121 determines with a frequency error, when the difference of the frequency of the sampled electric power value and the frequency at the time of normal is larger than a predetermined threshold value.

  Moreover, although the case where the abnormality determination part 121 determines abnormality based on electric power was demonstrated, you may determine abnormality by other indices regarding electric power, such as a voltage and electric energy.

  Further, the abnormality determination unit 121 may store only the upper and lower thresholds of the amplitude and frequency when normal, without storing normal wave sampling. The abnormality determination unit 121 may determine an error when the acquired power value is outside the range of the upper limit threshold and the lower limit threshold. Further, an average of power values for a predetermined period may be calculated, and an error may be determined when the average is outside the range of the upper limit threshold and the lower limit threshold.

  If the abnormality determination unit 121 determines that the acquired power value is abnormal, the abnormality notification unit 122 issues a notification to that effect. This notification includes a method of turning on an alarm lamp connected to the control device 100, an indication that the display device connected to the control device 100 is abnormal, and an identifier of the vibration power generation element determined to be abnormal. A method of displaying and is conceivable.

  The power control unit 130 includes a power usage unit 131. The power utilization unit 131 uses the power input from the generated power input unit 110 as power for other equipment or stores it in a power storage unit such as a storage battery. Thereby, the vibration energy produced by the vibration of the facility can be utilized as electric energy.

  With reference to FIG. 4, the abnormality monitoring method according to the embodiment of the present invention will be described.

  First, in step S101, the generated power input unit 110 waits for power to be input from the vibration power generation element. When power is input, abnormality determination unit 121 samples the power value of the input power in step S102.

  Here, in step S103, the abnormality determination unit 121 determines whether or not the sampling of the power value is abnormal. The abnormality determination unit 121 acquires, for example, power sampling that is traced a predetermined time from the current time, and compares it with normal sampling.

  If it is determined in step S103 that there is an abnormality, in step S104, the abnormality determination unit 121 inputs an abnormality to the abnormality reporting unit 122, and the abnormality reporting unit 122 reports the abnormality.

  On the other hand, if no abnormality is diagnosed in step S103, and if this process is not terminated in step S105, it waits for the next power to be input in step S101.

  In the example shown in FIG. 4, a case where it is determined whether or not an abnormality is made each time power is input will be described. However, the determination may be made asynchronously with respect to the input of power. For example, it may be determined whether there is an abnormality at regular time intervals such as once a day.

  With reference to FIG. 5, in the embodiment of the present invention, two patterns that are determined as abnormal by the abnormality determination unit 121 will be described. FIG. 5 shows sampling of power of a predetermined vibration power generation element, with the horizontal axis representing time and the vertical axis representing power P. Here, the normal wave W is a waveform obtained by sampling the power value when no abnormality occurs in the facility in which the vibration power generation element is installed. The normal wave W is sampled in advance and stored in the control device 100 when the equipment is normal.

  The amplitude error wave W1 has the same frequency as the normal wave W, but its amplitude is larger than that of the normal wave W. When the difference between the amplitude of the amplitude error wave W1 and the amplitude of the normal wave W exceeds a predetermined threshold, the abnormality determination unit 121 determines that an amplitude error has occurred.

  The frequency error wave W2 has the same amplitude as the normal wave W, but its frequency is smaller than that of the normal wave W. When the difference between the frequency of the frequency error wave W2 and the frequency of the normal wave W exceeds a predetermined threshold, the abnormality determination unit 121 determines that a frequency error has occurred.

  According to such an abnormality monitoring system according to the embodiment of the present invention, the vibration generating element is installed in each facility, and the control device 100 generates electric power obtained when the vibration generating element vibrates with the vibration of the facility. By acquiring, it is possible to detect an abnormality in the equipment installed remotely. Thereby, the frequency in which a person in charge of an installation goes to an installation can be reduced, and the cost in a water and sewage plant can be reduced.

  Moreover, by acquiring and sampling electric power sequentially from a vibration power generation element, it can be diagnosed whether it is abnormal by the tendency of the electric power value. Accordingly, even when electric power that is significantly deviated from the vibration power generation element is acquired instantaneously due to an operation error or the like, an abnormality diagnosis can be appropriately performed.

  Moreover, by using the electric power acquired from the vibration power generation element for other facilities, the electric power can be effectively used in the entire water and sewage plant.

  As described above, the abnormality diagnosis system according to the embodiment of the present invention can easily detect an abnormality in equipment in a water and sewage plant.

(Other embodiments)
As described above, the embodiments of the present invention have been described. However, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art.

  For example, the abnormality diagnosis method according to the embodiment of the present invention may be applied to an existing abnormality diagnosis system.

  It goes without saying that the present invention includes various embodiments not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

DESCRIPTION OF SYMBOLS 1 Water and sewage plant 2 Waterworks plant 3 Sewerage plant 4 River 10 Abnormality monitoring system 21 Water intake 22 Water purification plant 24 Pumping station 25 Reservoir 26 Water supply network 31 Sewage treatment plant 32 Pumping station 33 Sewage network 51, 52, 53 Vibration power generation element 100 Control device 110 Generated power input unit 120 Abnormality diagnosis unit 121 Abnormality determination unit 122 Abnormality reporting unit 130 Electric power control unit 131 Electric power use unit 190 Plant monitoring unit 200 Generator 201 Precipitation basin 202 Filtration basin 203 Clean water basin 204 Pump 241 Electric motor

Claims (3)

An abnormality monitoring system for detecting abnormalities in each facility of a water and sewage plant,
A vibration power generation element that is attached to the facility of the water and sewage plant and converts the vibration of the facility into electric power,
A generated power input unit for obtaining power from the vibration power generation element;
An abnormality determination unit that compares the power value of the power acquired by the generated power input unit with the normal power value of the facility to determine abnormality,
An abnormality monitoring system comprising: an abnormality reporting unit for reporting an abnormality when the abnormality of the facility is detected by the abnormality diagnosis unit. 2. The abnormality monitoring system according to claim 1, further comprising: a power control unit that inputs the power acquired from the generated power input unit to the facility of the water and sewage plant or stores the power in a power storage unit. The abnormality monitoring system according to claim 1, wherein the facility of the water and sewage plant is a facility that generates vibration.

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