JP4443247B2 - Status monitoring system and status monitoring method - Google Patents

Description

  The present invention relates to a technique for monitoring an operation state of equipment having a movable part such as a power plant.

  Patent Document 1 discloses a device abnormality diagnosis device that identifies a position where an abnormal sound generated due to device abnormality is generated. In this equipment abnormality diagnosis apparatus, a plurality of equipment generated sound sensors 3 are installed in the machine tool 1, and a noise signal captured by each equipment generated sound sensor 3 is analyzed by the contribution analysis unit 5. Identify the abnormal sound generation position of the device from the mounting position.

JP 2002-13977 A

  When the abnormal sound generation position of an existing power plant or chemical plant is specified using the device abnormality diagnosis device described in Patent Document 1, the above-described device generated sound sensor 3 is used as a component device (pump or motor) of the plant. Must be installed. However, depending on the structure of the plant, it may be difficult to attach the device-generated sound sensor 3 to the constituent devices of the plant after the plant is constructed.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to specify a position where a defect occurs in a facility without attaching a sensor to a component device of the facility to be monitored.

  In order to solve the above-described problem, in the present invention, a plurality of sound collecting means having a sound collecting surface configured by arranging a plurality of sound collecting elements having directivity in the same direction are arranged around the equipment to be monitored. Then, in each sound collecting means, the occurrence position of the defect is specified from the arrangement position on the sound collection surface of the collecting element that collects the acoustic information indicating the defect.

For example, the state monitoring system of the present invention is a state monitoring system for monitoring the operation state of equipment, and includes state information acquisition means for acquiring state information indicating the operation state of the monitoring target equipment, A plurality of sound collecting means to be installed; a normal operation acoustic information storage means for storing acoustic information collected in advance by the plurality of sound collecting means during normal operation of the monitoring target equipment; and the plurality of sound collecting means The failure occurrence position specifying means for specifying the occurrence position of the failure based on the sound information collected by the sound information and the sound information stored in the normal operation sound information storage means, and the constituent devices constituting the monitoring target equipment a design information storing unit that design information is stored including the position of the respective constituent devices and the every monitored equipment configuration devices, and defect content, the constituent device when said non degree occurs originating That the sound information, and defect information storage means corresponding relationship is recorded between said non degree occurrence the monitored equipment state information indicating an operation state of the trouble occurrence location trouble occurrence position specified by a particular means and Based on the design information stored in the design information storage means, a failure generating component device specifying means for specifying a component device of the monitored facility where a failure has occurred, and a failure occurring in the specified component device Fault content specifying means for specifying

Each of the plurality of sound collecting means has a sound collecting surface formed by arranging a plurality of sound collecting elements having directivity in the same direction. The normal operation acoustic information storage means stores, for each sound collection means, acoustic information collected by each sound collection element constituting the sound collection means during normal operation of the monitored facility. Then, the failure occurrence position specifying means collects acoustic information obtained by collecting acoustic information in which the difference between each of the plurality of sound collecting means and the acoustic information stored in the normal operation acoustic information storage means is larger than a predetermined threshold. Based on the position of the sound element on the sound collection surface, the occurrence position of the defect is specified. The defect content specifying means uses the defect information storage means, the component device of the monitored facility specified by the defect occurrence component device specifying means, and the defect occurrence position specified by the defect occurrence position specifying means The content of the defect is specified based on the acoustic information collected by the sound collection element corresponding to the above and the state information acquired by the state information acquisition unit.

  According to the present invention, using a plurality of sound collecting means having a sound collection surface, which is installed around a facility to be monitored and is configured by arranging a plurality of sound collecting elements having directivity in the same direction, Identify the location of equipment failure. Therefore, it is possible to specify the occurrence position of the malfunction of the equipment without attaching a sensor to the component equipment of the monitored equipment.

  Embodiments of the present invention will be described below.

  FIG. 1 is a schematic diagram of a state monitoring system that monitors the operating state of an existing power plant to which an embodiment of the present invention is applied.

As shown, condition monitoring system of the present embodiment, a plurality of sound collection devices 3 ₁ to 3 ₃ installed around the monitored portion of the existing power plant 1, a plurality of sound collection devices 3 ₁ to 3 ₃ and a failure occurrence detection device 4 connected to the plant control device 2 and a failure situation diagnosis device 5 connected to the failure occurrence detection device 4 via a communication medium such as a wireless communication network. Here, the plant control device 2 controls the power plant 1 and obtains various process state quantities such as fuel, exhaust gas temperature, and shaft rotational speed from the power plant 1.

The sound collection devices 3 _{1 to} 3 ₃ (hereinafter, also simply referred to as the sound collection device 3) have a sound collection surface having directivity divided into a plurality of areas, and for each area, collect sound from the front of the area. To do.

  FIG. 2 is a schematic configuration diagram of the sound collection device 3. As shown in the figure, the sound collection device 3 has a sound collection surface 31 divided into a plurality of areas 32, and each area 32 has a sound collection element (for example, a directional microphone) 33 having directivity in the same direction. Is installed. In the present embodiment, as indicated by a balloon 34 in the figure, the directivity direction D of the sound collection element 33 is a direction perpendicular to the sound collection surface 31, and the directivity angle α is a narrow angle. For this reason, the sound collection element 33 collects sound from the monitoring target portion located in front of the area 32 where the sound collection element 33 is installed. For each sound collection element 33 included in the sound collection device 3, the sound signal collected by the sound collection element 33 is used as identification information (for example, the area 32 where the sound collection element 33 is installed in the sound signal). 2D coordinate information on the sound pickup surface 31) is added and transmitted to the failure occurrence detection device 4.

In the present embodiment, as shown in FIG. 1, the three sound collection devices 3 _{1 to} 3 ₃ are placed around the monitoring target portion of the power plant 1 so that the planes including the sound collection surface 31 are orthogonal to each other. It is arranged. Specifically, the sound collection plane 31 of the sound collection device 3 ₁ are parallel to the ZX plane, sound collection surface 31 of the sound collector 3 ₂ are parallel to the YZ plane, and sound collection device 3 ₃ Osamu Three sound collection devices 3 _{1 to} 3 ₃ are arranged around the monitoring target portion of the power plant 1 so that the sound surface 31 is parallel to the XY plane.

Fault occurrence detection unit 4, based on the acoustic signals received from a plurality of sound collection devices 3 ₁ to 3 _3, the detecting the failure signs monitored portion, identifies the occurrence position of the defect indications detected. Then, the process state quantity information of the power plant 1 is obtained from the plant control device 2, and the failure sign detection information including the obtained process state quantity information and the occurrence position information of the trouble sign is transmitted to the trouble state diagnosis device 5.

  FIG. 3 is a schematic configuration diagram of the malfunction occurrence detection device 4. As shown in the figure, the failure occurrence detection device 4 includes an acoustic information receiving unit 41, a frequency spectrum analysis unit 42, a filtering unit 43, a failure sign detection unit 44, a failure sign occurrence position specifying unit 45, and a failure sign detection. The information transmission unit 46 includes a natural frequency spectrum DB (database) 47 and a normal operation frequency spectrum DB 48.

Sound information receiving unit 41 receives the acoustic signals of each area 32 of a plurality of sound collection devices 3 ₁ to 3 _3, performs processing such as signal amplification. Then, the acoustic signal for each processed area 32 is output in association with the sound collection devices 3 ₁ to ₃ 3 that transmitted the acoustic signal.

The frequency spectrum analyzer 42 performs a frequency spectrum analysis of the acoustic signals of each area 32 of the sound collector 3 ₁ to 3 ₃ output from the acoustic information receiving unit 41. Then, the frequency spectrum information obtained as a result is output in association with the sound collection device 3 and the area 32 associated with the original acoustic signal.

In the natural frequency spectrum DB 47, for each of the sound collection devices 3 _{1 to} 3 _{3, for} each area 32, the sound collection target space of the sound collection element 33 installed in the area 32 (part of the monitoring target portion of the power plant 1). ) Is stored.

FIG. 4 is a diagram showing an example of registered contents in the natural frequency spectrum DB 47. As shown in the figure, the natural frequency spectrum DB 47 includes natural frequency spectrum management TLs (tables) 471 _{1 to} 471 ₃ (hereinafter also simply referred to as natural frequency spectrum management TL 471) corresponding to the sound collection devices 3 _{1 to} 3 ₃ respectively. Have. The natural frequency management TL 471 has a record for each area 32 of the corresponding sound collection devices 3 _{1 to} 3 ₃ . The record includes a field 472 for registering an area ID (for example, two-dimensional coordinate information on the sound collection surface 31) which is identification information of the area 32, and a sound collection target space (power generation) of the sound collection element 33 installed in the area 32. And a field 473 for registering frequency spectrum information (natural frequency spectrum information) of sound that can be generated from a part of the monitoring target portion of the plant 1.

The filtering unit 43 performs a filtering process on the frequency spectrum information for each area 32 of the sound collection devices 3 ₁ to ₃ 3 output from the frequency spectrum analysis unit 42 using the natural frequency spectrum DB 47. Specifically, the natural frequency spectrum management TL 471 is searched from the natural frequency spectrum DB 47 using the accommodating device 3 associated with the frequency spectrum information to be filtered as a key, and further corresponds to the frequency spectrum information to be filtered. A record is searched from the searched natural frequency spectrum management TL 471 using the attached area 32 as a key. Then, the natural frequency spectrum information registered in the field 473 of the retrieved record is compared with the frequency spectrum information to be filtered, and the natural frequency spectrum information and a frequency component having a large deviation (for example, included in the natural frequency spectrum information). The frequency component higher than the maximum frequency component by a predetermined value or the frequency component lower than the minimum frequency component included in the natural frequency spectrum information by a predetermined value or more) is removed from the frequency spectrum information to be filtered as a noise component. To do. The filtering unit 43 outputs the filtered frequency spectrum information in association with the sound collection device 3 and the area 32 associated with the frequency spectrum information.

In the normal operation frequency spectrum DB 48, for each of the sound collection devices 3 _{1 to} 3 _{3, for} each area 32, the sound collection target space (power generation) of the sound collection element 33 installed in the area 32 during normal operation of the power plant 1. The natural frequency spectrum information of the sound generated from a part of the monitoring target portion of the plant 1 is stored.

FIG. 5 is a diagram showing an example of registered contents of the normal operation frequency spectrum DB 48. As shown in the figure, the normal operation frequency spectrum DB 48 includes normal operation frequency spectrum management TL 481 _{1 to} 481 ₃ (hereinafter also referred to simply as normal operation frequency spectrum management TL 481) corresponding to each of the sound collection devices 3 _{1 to} 3 _3. ). The normal operation frequency management TL 481 has a record for each area 32 of the corresponding sound collection devices 3 _{1 to} 3 ₃ . The record includes a field 482 for registering an area ID (for example, two-dimensional coordinate information on the sound collection surface 31), which is identification information of the area 32, and a sound collection element 33 installed in the area 32 when the power plant 1 is operating normally. And a field 483 for registering frequency spectrum information (frequency spectrum information during normal operation) of sound generated from the sound collection target space (part of the monitoring target portion of the power plant 1).

The failure sign detection unit 44 uses the normal operation frequency spectrum DB 48 to display a frequency spectrum indicating a failure sign from the frequency spectrum information for each area 32 of the sound collection devices 3 ₁ to ₃ 3 output from the filtering unit 43. Detect information. Specifically, the following processing is performed for each frequency spectrum information output from the filtering unit 43. That is, the normal operation frequency spectrum management TL 481 is searched from the normal operation frequency spectrum DB 48 using the accommodating device 3 associated with the frequency spectrum information (referred to as attention frequency spectrum information) as a key. The record is searched from the searched normal frequency spectrum management TL 481 using the area 32 associated with the key as the key. Then, the normal operation frequency spectrum information registered in the field 483 of the retrieved record is compared with the attention frequency spectrum information, and it is determined whether or not the deviation between the two is larger than a predetermined threshold. For example, for each frequency component included in the attention frequency spectrum information, the difference between the intensity (amplitude) of the frequency component and the intensity (amplitude) of the corresponding frequency component included in the normal operation frequency spectrum information is When it is equal to or greater than the predetermined value, it is determined that the deviation between the two is larger than the predetermined threshold. And / or frequency components that are higher than the maximum frequency component included in the frequency spectrum information during normal operation by a predetermined value or higher, and frequency components that are lower than the predetermined value than the minimum frequency component included in the frequency spectrum information during normal operation When included in the frequency spectrum information, it is determined that the deviation between the two is larger than a predetermined threshold. The failure sign detection unit 44 uses, as frequency spectrum information indicating a failure sign, the attention frequency spectrum information determined that the deviation between the two is larger than a predetermined threshold as the sound collection device 3 associated with the attention frequency spectrum information. And the information of area 32.

  The failure sign occurrence position specifying unit 45 specifies the occurrence position (three-dimensional position) of the failure sign based on the frequency spectrum information output from the failure sign detection unit 44.

FIG. 6 is a diagram for explaining the identification principle of the defect sign occurrence position in the defect sign occurrence position specifying unit 45. As shown, defect indication occurrence position identification unit 45, for each of the sound collection device ₃ 1 to 3 _3, the 2-dimensional coordinate information of each area 32 constituting the sound collection plane 31 (sound collector _{3 1} (z , x), the sound collection device _{3 2} (y, z), and, in the sound collector _{3 3} (x, y)) are shown area map TL451 ₁ ~451 ₃ (hereinafter, simply have also called) and area map 451 ing. Here, the area map TL451 has a common origin.

  When receiving the frequency spectrum information from the failure sign detection unit 44, the failure sign occurrence position specifying unit 45 specifies the area map TL451 of the accommodating device 3 associated with the frequency spectrum information, and the frequency spectrum information of the area map TL451. A flag 452 is set in the coordinate information corresponding to the area 32 associated with the.

Further, the malfunction sign occurrence position specifying unit 45 monitors the state of the flag 452 set in each area map TL451. Then, in each of the area map TL451 ₁ and the area map TL451 ₂ , it is checked whether or not the flag 452 is set in the area 32 having the same Z component. In the area map TL451 ₃ , when the flag 452 is set, the area 32 (in FIG. 6, the area 32 (z = 4, x = 2) in the area map TL451 ₁ and the area in the area map TL451 ₂ are set). It is further examined whether or not the flag 452 is set in the area 32 having the same X component and Y component as 32 (y = 2, z = 4). Then, if erected, the area 32 (FIG. 6 where the flag 452 is raised, the area 32 in the area map _{TL451 1 (z = 4, x} = 2), the area in the area map TL451 ₂ 32 (y = ₂ , Z = 4), and a three-dimensional coordinate position 453 (in FIG. 6, (x = 2) including the same X component, Y component, and Z component as the area 32 (x = 2, y = 2)) in the area map TL451 ₃ , Y = 2, z = 4)) is specified as the occurrence position of the failure sign.

  If the malfunction sign occurrence position specifying unit 45 identifies the occurrence position of the malfunction sign as described above, the frequency spectrum information of each accommodation device 3 corresponding to the identified occurrence position received from the malfunction sign detection unit 44. And the three-dimensional coordinate information of the specified occurrence position are transmitted to the failure sign detection information transmission unit 46.

  When the failure sign detection information transmission unit 46 receives the three-dimensional coordinate information of the occurrence position of the failure sign and the frequency spectrum information of each accommodation device 3 corresponding to the occurrence position from the failure sign occurrence position specifying unit 45, the plant control Various process state quantity information such as the fuel of the power plant 1, the exhaust gas temperature, and the shaft rotational speed is obtained from the apparatus 2. Then, three-dimensional coordinate information of the occurrence position of the failure sign, frequency spectrum information of each accommodating device 3 corresponding to the occurrence position, and failure sign detection information including various process state quantity information of the power plant 1, This is transmitted to the fault condition diagnosis device 5 via a communication medium such as a wireless communication network.

  The units 41 to 48 of the failure occurrence detection device 4 shown in FIG. 3 include a CPU, a memory, an external storage device such as an HDD, a reading device that reads data from a storage medium such as a CD-ROM, and the sound collection device 3. In a computer system including an I / O for transmitting and receiving data and a wireless communication device, the CPU is realized by loading a predetermined program stored in an external storage device or storage medium onto the memory and executing it. In this case, I / O is used for the acoustic information receiving unit 41, a wireless communication device is used for the failure sign detection information transmitting unit, and an external storage device or storage medium is used for the DBs 47 and 48.

  Returning to FIG. 1, the description will be continued.

  The failure status diagnosis device 5 identifies the component device of the power plant 1 where the failure sign has occurred based on the failure sign detection information received from the failure occurrence detection device 4. In addition, a past case that approximates the failure sign is searched.

  FIG. 7 is a schematic configuration diagram of the malfunction status diagnosis apparatus 5. As shown in the figure, the fault condition diagnosis apparatus 5 includes a fault sign detection information receiving unit 51, a fault sign generating device specifying unit 52, a fault sign content estimating unit 53, a fault sign content display unit 54, and a fault sign content registration. Unit 55, plant design information DB 56, and failure sign result DB 57.

  The defect sign detection information receiving unit 51 receives defect sign detection information from the defect occurrence detection device 4 via a communication medium such as a wireless communication network.

  The plant design information DB 56 stores device information of each component device of the monitoring target portion of the power plant 1.

FIG. 8 is a diagram illustrating an example of registered contents in the plant design information DB 56. As shown in the figure, the plant design information DB 56 has a record for each three-dimensional coordinate position of the monitoring target portion of the power plant 1 specified by the area maps TL451 _{1 to} 451 ₃ shown in FIG. The record is arranged at a field 561 for registering a three-dimensional coordinate position (x, y, z), a field 562 for registering a device name of a component device arranged at the three-dimensional coordinate position, and the three-dimensional coordinate position. A field 563 for registering the function, description, and the like of the component device, and a field 564 for registering CAD data of the component device arranged at the three-dimensional coordinate position.

  The failure sign generating device specifying unit 52 searches the plant design information DB 56 for a record in which the occurrence position of the failure sign included in the failure sign detection information received by the failure sign detection information receiving unit 51 is registered in the field 561. To do. Then, the component device specified by the device information of the retrieved record is specified as the component device in which the failure sign has occurred, and the device information of the record is output together with the failure sign detection information.

  The defect sign record DB 57 stores detailed information on each defect sign that has occurred in the past.

  FIG. 9 is a diagram illustrating an example of registered contents of the defect sign result DB 57. As shown in the figure, the defect sign record DB 57 has a record indicating detailed information of each of the defect signs that have occurred in the past. The record includes a field 571 for registering a defect sign occurrence position (x, y, z) included in the defect sign detection information, and a field 572 for registering a device name of a component device arranged at the occurrence position. The field 573 for registering the frequency spectrum information of the area 32 corresponding to the occurrence position of each sound collecting device 3 included in the failure sign detection information, and the process state quantity included in the failure sign detection information A field 574 for registering, a field 575 for registering an abnormal event of a component device arranged at the occurrence position, and a field for registering the content of a malfunction that is expected to occur due to the abnormal event 576.

When the failure sign content estimation unit 55 receives the failure sign detection information and the device information from the failure sign generation device identification unit 52, the occurrence position of the failure sign included in the failure sign detection information is registered in the field 571, and A record in which the device name included in the device information is registered in the field 572 is extracted from the defect symptom record DB 57. Furthermore, the sound collection devices included in the frequency spectrum information of the sound collection devices 3 ₁ to ₃ 3 registered in the fields 573 and 574 of each extracted record, the process state quantity of the power plant 1, and the failure sign detection information The frequency spectrum information of 3 _{1 to} 3 ₃ and the process state quantity of the power plant 1 are compared, and a record having a high matching degree with the failure sign detection information is specified.

Specifically, the extracted respective records, the frequency spectrum information of each of the sound collection device 3 ₁ to 3 ₃ contained in the field 573, sound pickup included in the defect indication detection information device 3 ₁ to 3 ₃ The deviation from each of the frequency spectrum information is examined, and records whose deviation is smaller than a predetermined threshold are further extracted from the extracted records. For example, the intensity of each frequency component of the frequency spectrum information of the sound collection device 3 ₁ to 3 ₃ contained in field 573 of a record (the amplitude), the sound pickup included in the defect indication detection information device 3 ₁ to 3 _When the difference from the intensity (amplitude) of each frequency component of the frequency spectrum information ₃ is less than a predetermined value, it is determined that the deviation between the two is smaller than a predetermined threshold. And / or a frequency component that is higher by a predetermined value than the maximum frequency component of the frequency spectrum information of the sound collection devices 3 ₁ to ₃ 3 included in the field 573 of the record, or a frequency component that is lower than the minimum frequency component by a predetermined value or more. When it is not included in the frequency spectrum information of the sound pickup devices 3 ₁ to ₃ 3 included in the sign detection information, it is determined that the deviation between them is smaller than a predetermined threshold value. Next, for each extracted record, the difference between the process state quantity contained in the field 574 and the process state quantity contained in the failure sign detection information is examined, and a record with the difference smaller than a predetermined value is further checked. Also extract. Then, the finally extracted record is specified as a record having a high degree of matching with the defect sign detection information.

  If the defect sign content estimation unit 55 identifies a record having a high matching degree with the defect sign detection information from the defect sign record DB 57 as described above, detailed information on the defect sign indicated by this record is stored in the past. Is output to the failure sign content display unit 54 together with the failure sign detection information and the device information received from the failure sign generation device specifying unit 52. If a record with a high matching degree cannot be specified, only the failure sign detection information and the device information received from the failure sign generating device specifying unit 52 are output to the failure sign content display unit 54.

  The defect sign content display unit 54 displays the defect sign detection information and device information received from the defect sign content estimation unit 55. At this time, when the case information that approximates the past is received, this information is also displayed.

  FIG. 10 is a diagram for explaining a display screen example of the defect sign content display unit 54. In this example, the device information 543 and the failure sign detection information 544 received from the failure sign content estimation unit 55 are displayed on the display screen 541 of the failure sign content display unit 54 as << detected failure sign >> 542. Yes. Further, the past approximate case information 546 received from the fault sign content estimation unit 55 is displayed as << past similar case >> 545 which is a case similar to the detected fault sign 542. Through such a display screen 541, the user can easily predict a failure caused by the detected failure sign.

  The failure sign content registration unit 55 receives an abnormal event and a failure content from the user for the << detected failure sign >> 542 displayed on the display screen 541 by the failure sign content display unit 54, and < <Detected fault sign> A record of detailed information of fault signs including device information and fault sign detection information displayed in 542 is generated, and this record is registered in the fault sign record DB 57.

  7 includes a CPU, a memory, an external storage device such as an HDD, a reading device that reads data from a storage medium such as a CD-ROM, a wireless communication device, and the like. In a computer system equipped with an input device such as a keyboard and mouse and a display device such as an LCD or CRT, the CPU loads and executes a predetermined program stored in an external storage device or storage medium. Is done. In this case, the failure sign detection information receiving unit is a wireless communication device, the failure sign content display unit 54 is a display device, the failure sign content registration unit 55 is an input device, and the DBs 56 and 57 are external storage devices. Or a storage medium.

  Next, the operation of the state monitoring system configured as described above will be described.

  FIG. 11 is a diagram for explaining the operation of the state monitoring system shown in FIG.

In fault occurrence detection unit 4, the frequency spectrum analyzer 42 performs a frequency spectrum analysis with respect to acoustic signals of each area 32 received from the sound collector 3 ₁ to 3 ₃ through the sound information receiving unit 41, area 32 Each frequency spectrum information is converted (S101). Next, the filtering unit 43 uses the natural frequency spectrum DB 47 to perform a filtering process on the frequency spectrum information for each area 32 of the sound collection devices 3 ₁ to ₃ 3 output from the frequency spectrum analysis unit 42, thereby generating noise. Remove ingredients. Thereafter, the failure sign detection unit 44 uses the normal operation frequency spectrum DB 48 to output frequency spectrum information having a large deviation from the normal operation frequency spectrum information of the sound collection devices 3 ₁ to ₃ 3 output from the filtering unit 43. It detects from the frequency spectrum information for every area 32, and sends to the malfunction symptom occurrence position specific | specification part 45 (S102). The defect indications generated identification unit 45 receives the frequency spectral information from the fault symptom detecting portion 44, the area map TL451 sound collecting device 3 ₁ to 3 ₃ corresponding to the frequency spectrum information, corresponding to the frequency spectral data A flag indicating failure sign detection is set in the area 32 (S103).

  Now, the malfunction sign occurrence position specifying unit 45 monitors an area map TL451 provided for each sound collection device 3. If the flag is set in the area 32 corresponding to the same three-dimensional coordinate position in all the area maps TL451 (Yes in S104), the three-dimensional coordinate position is specified as the defect sign occurrence position, and each sound collection The trouble sign detection information transmitting unit 46 generates the trouble sign detection information including the frequency spectrum information of the area 32 corresponding to the generation position of the device 3 and the process state quantity information of the power plant 1 obtained from the plant control device 2. Is transmitted to the fault condition diagnosis apparatus 5 via S (S105).

  On the other hand, in the fault condition diagnosis apparatus 5, when the fault sign detection information receiving unit 51 receives the fault sign detection information from the fault occurrence detection apparatus 4 (Yes in S <b> 201), the fault sign detection information receiving part 51 transmits this to the fault sign generation device specifying unit 52. The failure sign generating device specifying unit 52 specifies the component device of the power plant 1 arranged at the position where the failure sign is generated, based on the frequency spectrum information of each sound collecting device 3 included in the failure sign detection information. (S202). Next, the defect sign content estimation unit 53 selects the defect sign of the specified component device having a high degree of matching with the defect sign detection information from the detailed information of the defect sign that has occurred in the past registered in the defect sign result DB 57. Extract detailed information of. Then, the failure sign content display unit 54 displays this detailed information as information indicating the content of the estimated failure sign together with the identified component device and the failure sign detection information (S204).

  Now, when the failure sign content registration unit 55 receives a registration instruction from the user in the failure sign result DB 57 for the specified component device and the failure sign detection information displayed by the failure sign content display unit 54 (Yes in S205). ), Receives information on abnormal events and details of the failure from the user, and registers a record of detailed information of the failure sign including the received information and the identified component device and failure sign detection information in the failure sign result DB 57 ( S206).

  The embodiment of the present invention has been described above.

  In the present embodiment, a plurality of sound collection devices 3 each having a sound collection surface 31 configured by arranging a plurality of sound collection elements 33 having directivity in the same direction are arranged around the monitoring target portion of the power plant 1. Yes. Then, in each sound collection device 3, the position of occurrence of the failure sign (3) from the arrangement position (two-dimensional coordinate position) on the sound collection surface 31 of the sound collection element 33 (area 32) that picked up the acoustic signal indicating the failure sign. Dimension coordinate position) is specified. Therefore, according to the present invention, it is possible to specify the occurrence position of the failure sign in the monitoring target portion without newly attaching a sensor to each component device of the monitoring target portion of the power plant 1.

  Further, in the present embodiment, a defect sign result DB 57 in which detailed information (past cases) of defect signs that have occurred in the past is registered. Then, past cases having a high degree of matching with the acoustic signal picked up from the identified position of the defect sign are extracted from the defect sign record DB 57 and displayed to the user. Therefore, the user can estimate the content of the failure that occurs at the position where the specified failure sign is generated.

  In addition, this invention is not limited to said embodiment, Many deformation | transformation are possible within the range of the summary.

  For example, in the above embodiment, the case where the failure occurrence detection device 4 and the failure situation diagnosis device 5 are constructed on different computer systems has been described as an example. However, the failure occurrence detection device 4 and the failure situation diagnosis device 5 are the same. You may make it build on a computer system. In this case, the failure sign detection information transmission unit 46 and the failure sign detection information reception unit 51 are not necessary. Or you may make it implement | achieve each of the malfunction generation detection apparatus 4 and the malfunction condition diagnosis apparatus 5 using a some computer system. In the above-described embodiment, the acoustic information receiving unit 41 of the malfunction occurrence detection device 4 may have a function of correcting the variation of the acoustic signal depending on the ambient temperature and / or humidity. Moreover, in said embodiment, although the monitoring object installation is made into the power plant 1, this invention is applicable to the various installation which has a movable part.

FIG. 1 is a schematic diagram of a state monitoring system that monitors the operating state of an existing power plant to which an embodiment of the present invention is applied. FIG. 2 is a schematic configuration diagram of the sound collection device 3. FIG. 3 is a schematic configuration diagram of the malfunction occurrence detection device 4. FIG. 4 is a diagram showing an example of registered contents in the natural frequency spectrum DB 47. FIG. 5 is a diagram showing an example of registered contents of the normal operation frequency spectrum DB 48. FIG. 6 is a diagram for explaining the identification principle of the defect sign occurrence position in the defect sign occurrence position specifying unit 45. FIG. 7 is a schematic configuration diagram of the malfunction status diagnosis apparatus 5. FIG. 8 is a diagram illustrating an example of registered contents in the plant design information DB 56. FIG. 9 is a diagram illustrating an example of registered contents of the defect sign result DB 57. FIG. 10 is a diagram for explaining a display screen example of the defect sign content display unit 54. FIG. 11 is a diagram for explaining the operation of the state monitoring system shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Power generation plant, 2 ... Plant control apparatus, 3 ... Sound collection apparatus, 4 ... Defect generation detection apparatus, 5 ... Defect state diagnosis apparatus, 31 ... Sound collection surface, 32 ... Area, 33 ... Sound collecting element, 41 ... Acoustic receiver, 42 ... Frequency spectrum analyzer, 43 ... Filtering unit, 44 ... Defect sign detector, 45 ... Failure sign occurrence position specifying unit, 46... Failure sign detection information transmission unit, 47... Natural frequency spectrum DB, 48... Normal operation frequency spectrum DB, 51. ... failure sign generation device specifying unit, 53 ... failure sign content estimation unit, 54 ... failure sign content display unit, 55 ... failure sign content registration unit, 56 ... plant design information DB, 57 ... Defect indication results D

Claims (5)

A state monitoring system for monitoring the operating state of equipment,
State information acquisition means for acquiring state information indicating an operation state of the monitored facility;
A plurality of sound collection means installed around the monitored equipment;
Normal operation acoustic information storage means for storing acoustic information collected by the plurality of sound collection means during normal operation of the monitoring target equipment in advance;
A fault occurrence position specifying means for specifying a fault occurrence position based on the acoustic information collected by the plurality of sound pickup means and the acoustic information stored in the normal operation acoustic information storage means;
Design information storage means for storing design information including component devices constituting the monitoring target equipment and the position of each component device;
For each component device of the monitoring target facility, the correspondence between the content of the defect, the acoustic information emitted by the component device when the defect occurs, and the state information indicating the operation state of the monitoring target facility when the defect occurs is recorded Trouble information storage means,
Identifying a malfunctioning component device that identifies a component device of the monitored facility in which a defect has occurred based on the defect occurrence position identified by the defect occurrence position identifying unit and the design information stored in the design information storage unit Means ,
A failure content specifying means for specifying a failure occurring in the specified component device, and
Each of the plurality of sound collecting means has a sound collecting surface configured by arranging a plurality of sound collecting elements having directivity in the same direction,
The normal operation acoustic information storage means stores, for each sound collection means, acoustic information collected by each sound collection element constituting the sound collection means during normal operation of the monitoring target equipment,
The failure occurrence position specifying means is a sound collecting element that picks up acoustic information in which each of the plurality of sound collecting means has a difference from the acoustic information stored in the normal operation acoustic information storage means that is greater than a predetermined threshold. Based on the position of the sound collecting surface of the
The defect content specifying means uses the defect information storage means, the component device of the monitoring target equipment specified by the defect occurrence component device specifying means, and the defect occurrence position specified by the defect occurrence position specifying means A condition monitoring system that identifies the content of the defect based on the acoustic information collected by the sound collection element corresponding to and the status information acquired by the status information acquisition means . A claim 1 Symbol placement condition monitoring system,
The state monitoring system, wherein the plurality of sound collecting means are arranged so that planes including a sound collecting surface are orthogonal to each other. The state monitoring system according to claim 1 or 2 ,
Natural frequency information storage means for storing the natural frequency information of the monitored equipment that can be picked up by the plurality of sound pickup means;
Based on the natural frequency information of the monitoring target equipment stored in the natural frequency information storage means, noise is removed from the acoustic information collected by the plurality of sound collection means, and the fault occurrence position specifying means is detected. And a filtering means for outputting the condition monitoring system. A computer readable program for monitoring the operating state of the equipment,
In the storage device of the computer,
A sound collection device having a sound collection surface that is configured by arranging a plurality of sound collection elements having directivity in the same direction, which are installed around the monitored facility, collects sound during normal operation of the monitored facility. Acoustic information ,
Design information including component devices constituting the monitored equipment and the position of each component device ;
For each component device of the monitoring target facility, the correspondence between the content of the defect, the acoustic information emitted by the component device when the defect occurs, and the state information indicating the operation state of the monitoring target facility when the defect occurs is recorded has been and defect information, is stored,
The computing device of the computer executes the program,
Based on the position on the sound collecting surface of the sound collecting element that picks up the acoustic information in which the difference from the acoustic information stored in the storage device of each of the plurality of sound collecting devices is larger than a predetermined threshold, A defect occurrence position identifying means for identifying the occurrence position; and
A failure occurrence component device identification unit that identifies a component device of the monitored facility in which a failure has occurred, based on a failure occurrence position identified by the failure occurrence position identification unit and design information stored in the storage device; ,
Based on the defect information stored in the storage device, corresponds to the component device of the monitored facility identified by the defect occurrence component identifying unit and the defect occurrence position identified by the defect occurrence position identifying unit A failure content specifying means for specifying the content of the failure based on the acoustic information collected by the sound collection device and the state information indicating the operating state of the monitored facility acquired from the monitored facility; A computer-readable program characterized by functioning. A state monitoring method for monitoring the operating state of equipment,
A plurality of sound collecting means having a sound collecting surface configured by arranging a plurality of sound collecting elements having directivity in the same direction are installed around the equipment to be monitored,
For each of the sound collection means, acoustic information collected in advance by each of the sound collection elements constituting the sound collection means during normal operation of the monitored facility, and acoustic information collected by the plurality of sound collection means And, based on the position on the sound collecting surface of the sound collecting element that picks up the sound information of each of the plurality of sound collecting means that has collected the sound information having a difference from the sound information during normal operation greater than a predetermined threshold, Identify the location of
Based on the design information including the location of occurrence of the identified failure, and the configuration device constituting the monitored facility and the position of each component device, the configuration device of the monitored facility where the failure has occurred ,
For each component device of the monitoring target facility, the correspondence between the content of the defect, the acoustic information emitted by the component device when the defect occurs, and the state information indicating the operation state of the monitoring target facility when the defect occurs is recorded Acquired from the monitoring target equipment based on the specified fault information, the component equipment of the specified monitoring target equipment, the acoustic information collected by the sound pickup element corresponding to the specified fault occurrence position, and A state monitoring method characterized by identifying the content of a defect based on state information indicating the operating state of the monitored facility .

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