WO2014087494A1 - 計算システム及び計算方法 - Google Patents
計算システム及び計算方法 Download PDFInfo
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- WO2014087494A1 WO2014087494A1 PCT/JP2012/081445 JP2012081445W WO2014087494A1 WO 2014087494 A1 WO2014087494 A1 WO 2014087494A1 JP 2012081445 W JP2012081445 W JP 2012081445W WO 2014087494 A1 WO2014087494 A1 WO 2014087494A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/10—Different kinds of radiation or particles
- G01N2223/101—Different kinds of radiation or particles electromagnetic radiation
- G01N2223/1013—Different kinds of radiation or particles electromagnetic radiation gamma
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/20—Sources of radiation
- G01N2223/205—Sources of radiation natural source
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/40—Imaging
- G01N2223/401—Imaging image processing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/60—Specific applications or type of materials
- G01N2223/601—Specific applications or type of materials density profile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/60—Specific applications or type of materials
- G01N2223/631—Specific applications or type of materials large structures, walls
Definitions
- the present invention relates to a calculation system and a calculation method for calculating the structure of a structure.
- the non-destructive test has an advantage that the possibility of a decrease in soundness due to the inspection is low as compared with the destructive test. Moreover, it has the advantage that a restoration process after the test is not required, and is applied to various structures. For example, as an element of maintenance inspection of metal pipes conforming to industrial standards, there is a method to clarify the degree of wear inside the pipe by measuring the thickness of the object part to be measured using the reflection of ultrasonic pulses. Used. However, since this method directly contacts the ultrasonic transducer with the object to be measured, it is necessary to remove the pipe covering before the measurement and restore it after the measurement. There is a disadvantage that it takes.
- Patent Document 1 a technique is also used in which the process of removing and restoring the clothing material of the pipe is omitted by performing radiographic imaging.
- an artificial radiation source and a detector are installed at positions that sandwich a measurement target object.
- Patent Document 2 uses a muon of high energy secondary cosmic rays, which is a kind of natural radiation, to capture the degree of wear of the refractory in the furnace by transmitting through the furnace wall and bottom of the blast furnace for iron making. A method to clarify the above is shown.
- Patent Document 3 discloses a technique for clarifying the degree of change in the material of the measurement object by utilizing the property of the secondary cosmic ray muon passing through the measurement object.
- Patent Document 1 Although the above-described covering material removal / restoration step can be omitted, since the ability to transmit artificial radiation is weak, it is necessary to arrange a radiation source in the vicinity of the measurement target object. In a large-scale plant, it is impractical to install an artificial radiation source near all objects to be measured, and it is necessary to install and remove the radiation source and detector from each object to be measured at each measurement. There is a drawback that it requires a great deal of cost before and after the actual measurement.
- the density length of an object that the flight path penetrates is provided as a contrast image using particles with extremely high transparency and straightness. There is no need to place a detector near the object. However, in many cases, the captured transmission image has a defect that the density length including not only the measurement target object but also other objects through which the particle flight path passes is reflected in the contrast image.
- An object of the present invention is to provide an apparatus or a method for obtaining a contrast image reflecting an actual density length of only a desired measurement target object in a nondestructive test for inspection.
- a calculation system includes an imaging unit that captures structural information of an arbitrary section by cosmic rays that pass through a structure to be measured and another structure, and a structure having structure information of the other structure An information acquisition unit, a density length calculation unit that determines whether to include the structure information of the other structure as a measurement target, calculates a density length of a structure determined as a non-target, an image captured by the imaging unit, and the And an image calculation unit that calculates structure information of the structure to be measured based on the density length of the structure determined as a non-object.
- the calculation system includes a track acquisition unit that acquires a track of a cosmic ray that passes through a measurement target and another structure, an imaging unit that captures an image based on the track of the cosmic ray, and the space
- a first storage unit for storing information on track of the line a second storage unit having structure information of the measurement object and the other structure, and a first storage unit based on the structure information of the other structure.
- a density length calculating unit that calculates a density image of density length and calculates a density image of the second density length based on the structure information of the measurement object and the structure information of the other structure.
- the calculation method includes a first step of imaging structure information of an arbitrary section with a cosmic ray that passes through a structure to be measured and another structure, and the other structure.
- FIG. 1 is a drawing examined by the inventors of the present application prior to the invention.
- the situation where various non-measurement target objects exist is schematically illustrated in the route of the arrow M1 which is the flight route of the muon.
- the object to be measured 91 such as piping constituting the large-scale facility 90
- the muon detector 99 the wall of the building 92 surrounding the object to be measured 91 or the object to be measured 91 other than the object to be measured 91
- the flight path M1 also penetrates the pipe 93, the mountain 94 outside the building 92, and the other building 95.
- the flight path includes non-materials and shapes of various materials, such as the walls surrounding the building to be measured and the walls and pillars that make up the external building, or earth and sand that make up the topography of mountains and hills. It is conceivable that an object to be measured exists.
- the obtained contrast image includes information on the non-measurement target object in addition to the information caused by the object to be originally measured.
- FIG. 2 is a diagram showing a configuration of a large-scale facility state monitoring system according to an embodiment of the present invention.
- the large-scale facility state monitoring system 10 of this embodiment includes a track acquisition unit 20 and an information processing unit 30 as components.
- the track acquisition unit 20 will be described below.
- the track acquisition unit 20 includes a power supply unit 21, a detection unit 22, and a coincidence counting unit 23 as components.
- the power supply unit 21 is a power supply unit that supplies necessary power to the detection unit 22 and the coincidence counting unit 23.
- the detection unit 22 includes a first detector 221, an iron block 222, and a second detector 223 as components.
- Both the first detector 221 and the second detector 223 are position sensitive detectors.
- the position-sensitive detector here is one that can detect the coordinate value of the passing point of the detector when charged particles pass through.
- the arrangement relationship between the first detector 221 and the second detector 223 is preferably a relationship in which the above-described planar detectors are arranged in parallel to each other. If the plane of the second detector is inclined with respect to the plane of the first detector, charged particles that have passed through the measurement object and the first detector 221 cannot be efficiently captured, and this is prevented. In order to achieve this, it is conceivable that a larger plane than the first detector 221 is required. Therefore, the detection efficiency of charged particles can be increased as the respective planes change from the inclined relationship to the parallel relationship.
- charged particles are incident on the detection unit 22 at irregular timings from various azimuth and zenith angles.
- These charged particles include not only high-energy muons but also soft components such as electrons.
- the soft component is extremely inferior in the straightness in the object than the muon, and in order to obtain a contrast image based on the exact density length of the object to be measured, it is necessary to selectively detect only the muon with high straightness. .
- the second detector 223 can transmit a single coordinate value to the coincidence counting unit 23. This is because the muon passes through the iron block 222 as it is and enters the second detector 223.
- the second detector 223 transmits a plurality of coordinate values to the coincidence counting unit 23 almost simultaneously. . This is because the particles generate a large number of particles in the process of passing through the iron block 222, and the traveling directions of these particles are various.
- the coincidence counting unit 23 compares the times transmitted from the first detector 221 and the second detector 223, and the same muon passes only when the difference falls within a certain range. judge.
- the determined two sets of coordinate values are transmitted to the information processing unit 30. As will be described later, the muon trajectory can be obtained from these two sets of coordinate values determined to be simultaneous.
- the information processing unit 30 includes a power supply unit 31, a user interface 32, a storage unit 33, and a calculation unit 34 as components.
- the power supply unit 31 is a power supply unit that supplies necessary power to the user interface 32, the storage unit 33, and the calculation unit 34.
- the user interface 32 includes an input unit 321 such as a keyboard and a mouse and an output unit 322 such as a display device and a printer as constituent elements.
- the operator can perform the following operations via the user interface 32. For example, an operation for selecting one or more desired items from the options presented by the calculation unit 34, an operation for selecting a partial range of the geometric shape illustrated by the calculation unit 34, and a finite range presented by the calculation unit 34 For example, an operation for selecting a specific numerical value from the numerical values, and an operation for inputting a value to be substituted into a variable presented by the calculation unit 34.
- the storage unit 33 includes a track information storage unit 331, a terrain information storage unit 332, and a facility information storage unit 333 as components.
- the track information storage unit 331 combines the time information with the two sets of muon passage coordinate data transmitted from the coincidence counting unit 23 each time the muon passes and makes track (trajectory) information, and newly stores it. .
- the terrain information storage unit 332 holds geometric data indicating the terrain around the large-scale facility 90 having the measurement target object as a component, and data indicating the material or density of the terrain object constituting the terrain.
- the topography includes not only naturally formed mountains and hills, but also components such as artificially formed structures such as dams, tunnels, bridges, and buildings.
- the equipment information storage unit 333 has a position and a shape within a certain range such as a door, a hoist (for example, an installed crane), in addition to a static building member such as a wall, a pillar, and a beam constituting the large-scale equipment 90. It holds geometric shape data and data indicating the material or density of an object that can store an amount of fluid objects that can change within a certain range, such as an object that can change or a tank. In addition, the facility information storage unit 332 holds various amount values that can change within the certain range, data indicating the change range of the amount, and data indicating the material or density of the fluid object. .
- the calculation unit 34 includes an imaging unit 341, a density length calculation unit 342, and an image calculation unit 343 as components.
- the imaging unit 341 selects track information having time information corresponding to a period specified by the operator through the user interface 32 from among a large number of track information held in the track information storage unit 331, and the muon passage coordinates thereof.
- a contrast image of the measurement object is constructed based on the value data.
- this contrast image is referred to as an actual measurement image.
- the imaging unit 341 transmits real image data to the image calculation unit 343.
- the density length calculation unit 342 constructs a virtual contrast image by a method described later based on various data stored in the topographic information storage unit 332 and the facility information storage unit 333.
- this contrast image is referred to as a virtual image.
- the image calculation unit 343 performs an operation that the operator designates via the user interface 32 on the actual measurement image transmitted from the imaging unit 341 and the virtual image transmitted from the density length calculation unit 342, and the result is calculated by the user. Transmit to the interface 32. This calculation includes the one that directly handles the transmitted image as the calculation result.
- FIG. 3 is a diagram showing an example of the screen of the user interface 32.
- the screen 500 includes a mouse pointer 501, an image display unit 502, an object list display unit 503, a display mode selection unit 504, a virtual image mode selection unit 505, an actual image time designation unit 506, and a variable state quantity designation unit 507.
- Various operations by an operator are realized in cooperation with an input unit 321 such as a mouse.
- the display mode selection unit 504 shows four choices “target selection”, “measured image display”, “virtual image display”, and “comparison display” as display modes, and the operator can select one of them.
- the image display unit 502 displays a drawing of the large-scale facility 90.
- This drawing only needs to be a drawing that can determine the state of equipment such as a plan view and a three-dimensional view.
- a total of four types of drawings, a plan view and a three-dimensional view viewed from three directions, are displayed side by side.
- a plurality of drawings may be combined.
- the three-dimensional view may be displayed in the form of a cross-sectional view cut out by an arbitrary plane.
- a measurement target flag is also held in the facility information storage unit 333 as attribute information of each object constituting the large-scale facility 90.
- This measurement target flag is a binary state variable and indicates whether the object is a measurement target or a non-measurement target.
- the object to be measured is highlighted in the form of drawing in a specific color or blinking on the drawing, so that the operator can easily recognize it.
- identification names of individual objects constituting the large-scale facility 90 are displayed in the form of a list, and each object has a symbol added according to the measurement target flag, or the identification name is color-coded. Thus, the operator can easily recognize whether or not the measurement target.
- the measurement target flag of the object can be changed.
- the measurement target flag can also be changed by operating the object identification name with the mouse. This change result is registered in the facility information storage unit 333.
- the image display unit 502 displays the actual image or virtual image transmitted from the image calculation unit 343, respectively.
- the image display unit 502 displays a comparison image transmitted from the image calculation unit 343.
- the comparison image is, for example, a color image obtained by superimposing the actual image as a blue contrast image and the virtual image as a red contrast image, or representing the difference between the actual image and the virtual image. It is an image.
- the calculation between the actually measured image and the virtual image is performed by the image calculation unit 343.
- the virtual image mode selection unit 505 shows three options “only target”, “only non-target”, and “all objects” as the virtual image mode, and the operator can select one of them.
- the density length calculation unit 342 targets only the objects whose measurement target flag value is the measurement target among the objects held in the facility information storage unit 333. In addition, a line segment in which a virtual linear muon track corresponding to each pixel is cut out by each object is calculated.
- the product of the density of the object is the density length of the object, and the sum of the density lengths of all the objects to be processed is the pixel value of the pixel. In this way, the density length is obtained for all the pixels, and a contrast image constructed by normalizing it is used as a virtual image.
- the correspondence relationship between the virtual linear muon track and the pixel matches the correspondence relationship between the muon track and the pixel that are actually detected when the imaging unit 341 constructs the actual measurement image. , Predetermined. For an object whose position and shape can change within a certain range, or an object that can store an amount of fluid objects that can change within a certain range, such as displacement held in the equipment information storage unit 333 It is used when constructing the virtual image after referring to the value and calculating its shape as appropriate.
- the density length calculation unit 342 has a measurement target flag value that is a non-measurement target among the objects held in the facility information storage unit 333.
- a virtual image is constructed for all objects and all objects held in the terrain information storage unit 332. The specific construction method is the same as when the virtual image mode is “target only”.
- the density length calculation unit 342 targets all objects held in the facility information storage unit 333 and all objects held in the terrain information storage unit 332. Then, build a virtual image.
- the specific construction method is the same as when the virtual image mode is “target only”.
- the virtual image mode By setting the virtual image mode to “non-target only” and the display mode to “comparison display”, the influence of the non-measurement target object is eliminated, and a contrast image of only the measurement target object can be provided.
- contrast information on the difference between the terrain information and facility information stored in the storage unit and the actual object state is contrasted. It can be provided in the form of an image, which can be used to detect construction defects and secular changes.
- the measured image time designation unit 506 has an input field for designating the period of track information used when the imaging unit 341 constructs the measured image. For example, the operator operates the keyboard using the start date and the end date. Etc. can be input.
- the variable state quantity designation unit 507 has a column for designating values such as displacement of each object, which is used when the density length calculation unit 342 constructs a virtual image.
- a sliding door named “sliding door 89D3”
- the amount of “displacement” can be specified to a value of “4.54 m” by keyboard operation or the like.
- a non-destructive test for the purpose of soundness inspection of piping or the like constituting a large structure such as a power plant is performed without removing / recovering the covering material of the object to be measured. It is possible to obtain a contrast image reflecting the actual density length of only a desired measurement target object without installing or removing the source.
- the present invention it is possible to obtain an image showing a difference between an actual state of a desired measurement target object and an ideal design state. As a result, the soundness of the plant can be constantly monitored during operation, and a plant with a high operation rate and high safety can be provided.
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Abstract
Description
20 飛跡取得部
30 情報処理部
90 大規模設備
91 測定対象物体
Claims (9)
- 測定対象の構造物と他の構造物とを透過する宇宙線により任意の区間の構造情報を撮像する撮像部と、
前記他の構造物の構造情報を有する構造情報取得部と、
前記他の構造物の構造情報を測定対象として含めるか判断し、非対象として判断した構造の密度長を算出する密度長算出部と、
前記撮像部により撮像された画像と前記非対象として判断した構造の密度長とに基づき測定対象の構造物の構造情報を計算する画像演算部と、を有する計算システム。 - 請求項1において、
前記測定対象の構造物の構造情報は、前記測定対象の構造物の密度長であることを特徴とする計算システム。 - 請求項1において、
前記画像演算部は前記測定対象の構造物の構造情報により、前記測定対象の構造物の損耗を評価することを特徴とする計算システム。 - 測定対象と他の構造物とを透過する宇宙線の飛跡を取得する飛跡取得部と、
前記宇宙線の飛跡に基づいて撮像する撮像部と、
前記宇宙線の飛跡の情報を保持する第1の記憶部と、前記測定対象ならびに前記他の構造物の構造情報を有する第2の記憶部と、
前記他の構造物の構造情報に基づいて第1の密度長の濃淡像を算出し、かつ前記測定対象の構造情報ならびに前記他の構造物の構造情報に基づいて第2の密度長の濃淡像を算出する密度長算出部と、を有する計算システム。 - 請求項4において、
前記計算システムは、前記撮像部により撮像した画像と前記第1の密度長の濃淡像とに基づいて前記撮像した画像を補正し、前記撮像した画像と前記第2の密度長の濃淡像との差異を示す濃淡像を演算する画像演算部と、
を有する計算システム。 - 請求項4において、
前記飛跡取得部は測定対象を挟むように配置された第1乃至第2検出器と、前記第1検出器ならびに前記第2検出器に接続され検出された宇宙線の強度を係数する同時計数部と、を有する計算システムであって、
前記同時計数部は、前記宇宙線がミュオンであるか判断し、ミュオンと判断した宇宙線の飛跡のみを取得することを特徴とする計算システム。 - 測定対象の構造物と他の構造物とを透過する宇宙線により任意の区間の構造情報を撮像する撮像する第1のステップと、
前記他の構造物の構造情報を取得する第2のステップと、
前記他の構造物の構造情報を測定対象として含めるか判断する第3のステップと、
前記第3のステップにて非対象として判断した構造の密度長を算出する第4のステップと、
前記第1のステップにより撮像された画像と前記第4のステップにて算出した密度長とに基づき測定対象の構造物の構造情報を計算する第5のステップと、を有する計算方法。 - 請求項7において、
前記測定対象の構造物の構造情報は、前記測定対象の構造物の密度長であることを特徴とする計算方法。 - 請求項7において、
前記測定対象の構造物の構造情報により、前記測定対象の構造物の損耗を評価する第6のステップと、を有する計算方法。
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PCT/JP2012/081445 WO2014087494A1 (ja) | 2012-12-05 | 2012-12-05 | 計算システム及び計算方法 |
US14/649,924 US20150293040A1 (en) | 2012-12-05 | 2012-12-05 | Calculation system and calculation method |
JP2014550839A JPWO2014087494A1 (ja) | 2012-12-05 | 2012-12-05 | 計算システム |
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JP2017015413A (ja) * | 2015-06-28 | 2017-01-19 | 株式会社サイエンスインパクト | 放射線計算装置、放射線計算方法、放射線計算プログラム |
JP2017044642A (ja) * | 2015-08-28 | 2017-03-02 | 株式会社東芝 | 構造物の検査装置及びその検査方法 |
JP2022047821A (ja) * | 2020-09-14 | 2022-03-25 | 株式会社東芝 | 非破壊物質組成識別装置および非破壊物質組成識別方法 |
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TWI639102B (zh) * | 2016-08-10 | 2018-10-21 | 張雅如 | 一種指標顯示裝置、指標控制裝置、指標控制系統及其相關方法 |
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AKIHIKO SHINOTAKE: "Observation for the Inner Structure of Blast Furnace by Cosmic-Ray Muon Radiography", BULLETIN OF THE IRON AND STEEL INSTITUTE OF JAPAN (FERRUM), vol. 14, no. 11, 1 November 2009 (2009-11-01), pages 700 - 705 * |
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JP2017015413A (ja) * | 2015-06-28 | 2017-01-19 | 株式会社サイエンスインパクト | 放射線計算装置、放射線計算方法、放射線計算プログラム |
JP2017044642A (ja) * | 2015-08-28 | 2017-03-02 | 株式会社東芝 | 構造物の検査装置及びその検査方法 |
JP2022047821A (ja) * | 2020-09-14 | 2022-03-25 | 株式会社東芝 | 非破壊物質組成識別装置および非破壊物質組成識別方法 |
JP7476058B2 (ja) | 2020-09-14 | 2024-04-30 | 株式会社東芝 | 非破壊物質組成識別装置および非破壊物質組成識別方法 |
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