WO2023042303A1 - 状態判定装置、状態判定方法、及び、状態判定プログラムが格納された記録媒体 - Google Patents
状態判定装置、状態判定方法、及び、状態判定プログラムが格納された記録媒体 Download PDFInfo
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- WO2023042303A1 WO2023042303A1 PCT/JP2021/033942 JP2021033942W WO2023042303A1 WO 2023042303 A1 WO2023042303 A1 WO 2023042303A1 JP 2021033942 W JP2021033942 W JP 2021033942W WO 2023042303 A1 WO2023042303 A1 WO 2023042303A1
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- 238000000034 method Methods 0.000 title claims description 18
- 238000005259 measurement Methods 0.000 claims abstract description 50
- 230000002159 abnormal effect Effects 0.000 claims abstract description 33
- 238000004364 calculation method Methods 0.000 claims description 22
- 238000006073 displacement reaction Methods 0.000 claims description 19
- 230000010365 information processing Effects 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 7
- 238000001556 precipitation Methods 0.000 claims description 6
- 239000003673 groundwater Substances 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 14
- 238000004458 analytical method Methods 0.000 description 9
- 238000004590 computer program Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008241 heterogeneous mixture Substances 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 238000010801 machine learning Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
Definitions
- the present invention relates to a state determination device, a state determination method, and a recording medium storing a state determination program.
- Patent Document 1 discloses that the amount of displacement of an object on the ground surface measured using SAR is acquired, and the amount of displacement and a criterion for determining the deformation of the object are used. Disclosed is a degree of deformation determination system for determining the degree of deformation.
- Patent Document 2 describes SAR image analysis that holds a plurality of SAR image data obtained by observing an observation range at different acquisition times and sensor observation data of a group of sensor devices observing known coordinates of the observation range.
- a system is disclosed. This system performs interference analysis on multiple SAR image data to obtain interference analysis result data, and the displacement amount of each analysis point included in the interference analysis result data and the observation coordinates included in the sensor observation data Extract the correlation with each observation data.
- JP 2017-215248 A Japanese Patent Application Laid-Open No. 2020-020740
- the displacement of the position of the observation point included in the structure is observed by the observation information obtained by observing the structure (building, bridge, etc.) that exists on the ground surface by SAR. Since a material such as metal that constitutes the structure expands and contracts depending on temperature, there is regularity between the amount of displacement at the observation point and the air temperature. Therefore, if the displacement of the newly observed observation point satisfies the regularity, the state of the structure is normal, and if the displacement of the newly observed observation point does not satisfy the regularity, The condition of the structure is presumed to be abnormal. In this case, for example, if it is determined whether the state of the structure is normal or not based on the amount of displacement at the observation point without considering the air temperature, there is a risk that the determination will be erroneous.
- Patent Documents 1 and 2 do not specifically mention such problems.
- the main purpose of the present invention is to more accurately determine whether the state near the ground surface is abnormal from the observation information observed by SAR.
- a state determination device includes: acquisition means for acquiring a state measurement value representing a state near the ground surface by analyzing observation information near the ground surface by a satellite-borne synthetic aperture radar; The relationship between the value of the index and the measured state value, or the relationship between the estimated state value near the ground surface estimated from the value of the index and the measured state value, for which a predetermined regularity may exist between and a determination means for determining whether or not the regularity is satisfied, and the relationship between the index value and the state measurement value or the relationship between the state estimated value and the state measurement value satisfy the predetermined regularity and output means for outputting determination result information indicating that the state is abnormal when there is no such state.
- a state determination method analyzes observation information near the ground surface by a satellite-borne synthetic aperture radar to determine the state near the ground surface by an information processing device. obtain a state measurement value representing the state, and determine the relationship between the value of the index and the state measurement value that may have a predetermined regularity with the state, or the estimated state value near the ground surface estimated from the value of the index determining whether or not the relationship between the state measurement values satisfies the predetermined regularity, and if the predetermined regularity is not satisfied, output determination result information indicating that the state is abnormal.
- the present invention it is possible to obtain a state determination device or the like that more accurately determines whether or not the state near the ground surface is abnormal from observation information observed by SAR.
- FIG. 4 is a diagram illustrating a first example in which the state determination device 10 according to the first embodiment of the present invention determines whether or not the state near the ground indicated by the state measurement value 151 is normal.
- FIG. 7 is a diagram illustrating a second example in which the state determination device 10 according to the first embodiment of the present invention determines whether or not the state near the ground indicated by the state measurement value 151 is normal.
- FIG. 4 is a diagram showing an example of a manner in which determination result information 155 according to the first embodiment of the present invention is displayed on a display screen 200 of a management terminal device 20; 4 is a flow chart showing the operation of the state determination device 10 according to the first embodiment of the present invention; It is a block diagram which shows the structure of the state determination apparatus 30 which concerns on the 2nd Embodiment of this invention.
- 1 is a block diagram showing the configuration of an information processing device 900 capable of realizing a state determination device according to each embodiment of the present invention; FIG.
- FIG. 1 is a block diagram showing the configuration of a state determination device 10 according to the first embodiment of the invention.
- the state determination device 10 according to the present embodiment is a device that determines whether or not the state near the ground surface is abnormal based on SAR observation data 101 (observation information) obtained by observing the vicinity of the ground surface using SAR.
- the state determination device 10 includes an acquisition unit 11, a determination unit 12, an output unit 13, a generation unit 14, and a storage unit 15.
- the acquisition unit 11, the determination unit 12, the output unit 13, and the generation unit 14 are examples of acquisition means, determination means, output means, and generation means, respectively.
- the storage unit 15 is, for example, a storage device such as a RAM (Random Access Memory) or a hard disk 904, which will be described later with reference to FIG.
- the storage unit 15 stores state measurement values 151 , calculation criteria 152 , state estimated values 153 , determination criteria 154 , and determination result information 155 . Details of these pieces of information stored in the storage unit 15 will be described later.
- the acquisition unit 11 acquires the SAR observation data 101 and index data 102 from an external device.
- the external device may be, for example, the management terminal device 20 or an information processing device such as a server having a database function.
- the SAR observation data 101 is, as described above, data obtained by observing the vicinity of the ground surface with SAR.
- the SAR observation data 101 includes, for example, an image of the vicinity of the ground surface captured by electromagnetic waves of a predetermined wavelength.
- the image includes information representing the distance to the vicinity of the surface of the ground, which is the object of observation.
- the SAR observation data 101 may include, for example, water content data on the surface of the earth.
- the water content can be observed, for example, from the backscattering coefficient of electromagnetic waves observed in measuring the distance to the ground surface.
- the vicinity of the ground surface, which is an observation target includes the ground surface or structures existing on the ground surface.
- the structure includes, for example, a building such as a building or a bridge.
- the acquisition unit 11 acquires (determines) the state measurement value 151 representing the state near the ground surface.
- the state measurement value 151 represents, for example, the amount of displacement of the ground surface or the position of a structure existing on the ground surface due to upheaval or subsidence of the ground. Since the method of obtaining the state measurement value 151 by analyzing the SAR observation data 101 is well known, detailed description thereof will be omitted in this embodiment.
- the acquisition unit 11 stores the acquired state measurement values 151 together with the SAR observation data 101 in the storage unit 15 .
- the index data 102 is, for example, data representing at least one of natural factors and man-made factors that affect the state near the ground represented by the state measurement value 151 .
- the above-mentioned natural factors include temperature, precipitation, groundwater volume, and geology near the surface of the observation target.
- a material such as metal that constitutes a structure existing on the ground surface expands and contracts depending on temperature, so there is regularity between the amount of displacement of the position of the observation point in the structure and the air temperature.
- air temperature is an indicator that affects near-surface conditions represented by condition measurements 151 .
- the amount of precipitation, the amount of groundwater, geology, etc. are indices that affect the subsidence of the ground represented by the state measurement value 151 .
- the acquisition unit 11 can acquire, for example, data published by the Japan Meteorological Agency, research institutes, etc. as the index data 102 representing the amount of precipitation, amount of groundwater, geology, and the like.
- the above-mentioned human factors are, for example, construction work on the ground near the ground surface, which is the object of observation, and traffic volume near the ground surface.
- construction work on the ground near the ground surface which is the object of observation
- traffic volume near the ground surface For example, ground subsidence may occur due to shield construction performed underground of the ground that is the object of observation.
- the traffic volume near the ground surface which is the object of observation, is an index that affects the state of bridges, roads, and the like existing near the ground surface.
- the acquisition unit 11 acquires, for example, data published by government agencies, road construction operators, etc. as index data 102 representing construction work on the ground near the ground surface, which is an observation target, and traffic volume near the ground surface. It is possible.
- the information represented by the index data 102 is not limited to the information described above.
- the index data 102 may include information representing natural and man-made factors different from those described above.
- the acquisition unit 11 stores the acquired index data 102 in the storage unit 15 .
- the determination unit 12 uses the calculation criteria 152 from the index data 102 acquired by the acquisition unit 11 to calculate a state estimated value 153 near the surface of the observation target.
- the determination unit 12 determines whether predetermined regularity is satisfied (normal) between the calculated state estimated value 153 and the state measurement value 151 acquired by the acquisition unit 11 as described above.
- Criterion 154 is used to determine. Note that the calculation criteria 152 and the determination criteria 154 are given in advance by, for example, an administrator of the state determination device 10 or the like.
- FIG. 2 is a diagram illustrating a first example in which the determination unit 12 according to the present embodiment determines whether or not the state near the ground indicated by the state measurement value 151 is normal.
- a natural phenomenon occurs in the ground near the ground surface, which is the object of observation, in which the ground subsides at a constant speed over time.
- the index that affects ground subsidence near the surface of the ground, which is the object of observation is the elapsed time from a predetermined time.
- the calculation criterion 152 represents a linear relationship between the elapsed time from a given period and the amount of land subsidence.
- the determination unit 12 calculates a state estimation value 153 shown as a dotted line in FIG. 2 based on a calculation reference 152 representing the linear relationship.
- FIG. 3 is a diagram explaining a second example in which the determination unit 12 according to the present embodiment determines whether or not the state near the ground indicated by the state measurement value 151 is normal.
- the example shown in FIG. 3 represents the relationship between the amount of displacement of the position of the observation point and the temperature in a structure existing near the surface of the ground that is the object of observation.
- the temperature is an index that affects the displacement of the position of the observation point in the structure existing near the surface of the ground to be observed.
- the calculation criterion 152 represents a linear relationship between the temperature and the displacement of the position of the station.
- the determination unit 12 calculates a state estimation value 153 shown as a dotted line in FIG. 3 based on a calculation reference 152 representing the linear relationship.
- the shaded region centered on the estimated state value 153 is assumed to be the normal range (range within assumption) regarding the amount of displacement of the position of the observation point. That is, in this case, if the absolute value of the difference between the state measurement value 151 and the state estimation value 153 is equal to or less than the threshold shown as the normal range in FIG. If the absolute value is larger than the threshold, it indicates that the state near the surface of the earth to be observed is abnormal.
- the predetermined regularity that exists between the state near the ground surface, which is the object of observation, and the index is not limited to the linear relationship illustrated in FIGS.
- the predetermined regularity may be, for example, a correlation, or may be a relationship that allows simulation of the state near the surface of the ground, which is the observation target, based on the index.
- the criteria 154 are not limited to criteria using thresholds as exemplified in FIGS. Further, the criterion 154 may be a criterion using a threshold that changes according to the value of the index instead of a constant threshold. For example, when the degree of variation in the values representing the state of the vicinity of the ground that is the object of observation increases as the value of the index increases, the criterion 154 is a criterion that uses a larger threshold as the value of the index increases. good too.
- the determination unit 12 determines that the state of the vicinity of the ground surface, which is the observation target, is normal with respect to a plurality of indices (a combination of a plurality of indices), not for a single index as shown in the examples of FIGS. 2 and 3 . It may be determined whether Further, instead of using the estimated state value 153 obtained from the value of the index, the determination unit 12 may determine whether or not a predetermined regularity is satisfied between the value of the index itself and the measured state value 151. . However, in this case, it is assumed that the predetermined regularity in the normal state existing between the index value itself and the state measurement value 151 is obtained in advance.
- calculation reference 152 may be an estimation model that has learned the relationship between past index values and values representing the state of the vicinity of the ground surface.
- FIG. 4 is a diagram showing inputs to and outputs from the calculation reference 152 when the calculation reference 152 according to this embodiment is the estimation model described above.
- Calculation criteria 152 illustrated in FIG. 4 input index 1 represented by index data 102 as explanatory variable x1 , index 2 as explanatory variable x2 , and index n (n is an arbitrary natural number) as explanatory variable x. Enter as n .
- the calculation reference 152 then outputs the objective variable f(x 1 , x 2 , . . . , x n ) as the state estimate 153 .
- the generation unit 14 learns the relationship between the values of the indices and the values representing the state of the vicinity of the ground surface using past values of the indices 1 to n and the state measurement value 151 as teacher data, thereby generating a calculation reference that is an estimation model. 152 is generated or updated.
- the generation unit 14 may use a technique such as heterogeneous mixture learning, for example.
- the output unit 13 transmits to the management terminal device 20 determination result information 155 representing the result of determination by the determination unit 12 as to whether the state near the ground surface, which is the object of observation, is normal or abnormal.
- the management terminal device 20 displays the determination result information 155 received from the output unit 13 on the display screen 200 .
- FIG. 5 is a diagram showing an example of how the determination result information 155 according to the present embodiment is displayed on the display screen 200 of the management terminal device 20.
- the determination result information 155 includes information represented by the SAR observation data 101 and the index data 102 in addition to the determination result by the determination unit 12 .
- the output unit 13 controls the management terminal device 20 to display the output determination result information 155 on the display screen 200 as illustrated in FIG.
- the pins on the map displayed in the upper right window of the display screen 200 represent observation points, and the lines represent roads.
- the left window of display screen 200 is the screen used by the user to select conditions relating to near-surface conditions.
- the user designates "rapid (abnormal) change" and "construction area”.
- the management terminal device 20 changes the display color (for example, from white to black) of a pin representing an observation point where an abnormal change is observed in the state near the ground surface on the map according to the selection by the user described above, and Shows a shaded ellipse that represents the area.
- the management terminal device 20 displays detailed information about that observation point.
- the management terminal device 20 displays an image in the vicinity of the observation point and a graph regarding the amount of displacement of the state of the ground surface at the observation point.
- the image represents, for example, a crack or the like that has occurred on the road surface.
- the graph may be a graph relating to temperature or amount of precipitation. It is assumed that the image near the observation point is acquired by a monitoring camera installed near the observation point.
- the acquisition unit 11 acquires SAR observation data 101 and index data 102 related to the vicinity of the ground surface, which is the observation target (step S101).
- the acquisition unit 11 acquires the state measurement value 151 by analyzing the SAR observation data 101 (step S102).
- the determination unit 12 calculates the estimated state value 153 based on the index data 102 and the calculation criteria 152 acquired by the acquisition unit 11 (step S103). The determination unit 12 checks whether the relationship between the calculated state estimation value 153 and the state measurement value 151 satisfies the regularity indicated by the determination criteria 154 (step S104).
- step S105 If the relationship between the estimated state value 153 and the measured state value 151 satisfies the regularity indicated by the criterion 154 (Yes in step S105), the determination unit 12 determines that the state near the ground surface is normal. Result information 155 is generated (step S106). If the relationship between the estimated state value 153 and the measured state value 151 does not satisfy the regularity indicated by the criterion 154 (No in step S105), the determination unit 12 indicates that the state near the ground surface is abnormal. The determination result information 155 is generated (step S107).
- the output unit 13 transmits the determination result information 155 to the management terminal device 20 (step S108), and the entire process ends.
- the state determination device 10 can more accurately determine whether or not the state near the ground surface is abnormal from observation information observed by SAR. The reason for this is that the state determination device 10 performs a predetermined This is because it is determined whether or not the regularity of is satisfied.
- the ground there may be some regularity between various indices (factors) and the state of the ground surface represented by the observation information obtained by observing the vicinity of the ground surface with SAR. For example, it is assumed that ground subsidence at a certain location is observed based on the observation information. In addition, continuous subsidence of the ground over time has been observed at this location, and the newly observed amount of ground subsidence is within the range assumed from the previously observed amount of ground subsidence. If it fits (that is, satisfies the regularity), it can be said that the condition of the ground is normal. On the other hand, if the newly observed amount of ground subsidence deviates from the range assumed from the previously observed amount of ground subsidence (that is, does not satisfy the regularity), the ground is abnormal.
- the state determination device 10 determines whether or not the state near the ground surface is abnormal based on the regularity between the state near the ground surface in the normal state and the index. It is possible to more accurately determine whether the state of is abnormal.
- the state determination device 10 obtains, for example, a proposed correlation system between the state near the ground surface and the index in a normal state (normal state), and the correlation between the state measurement value 151 and the index is determined in the normal state. It may be determined whether or not the correlation is equal to the correlation of When the correlation between the state measurement value 151 and the index is equal to the normal correlation, the state determination device 10 determines that the state near the ground surface is normal, and when the above two correlation schemes are different, the state near the ground surface is normal. is determined to be abnormal.
- a proposed correlation system between the state near the ground surface and the index in a normal state normal state
- the correlation between the state measurement value 151 and the index is determined in the normal state. It may be determined whether or not the correlation is equal to the correlation of
- the state determination device 10 determines that the state near the ground surface is normal, and when the above two correlation schemes are different, the state near the ground surface is normal. is determined to be abnormal.
- the state determination device 10 further includes a generation unit 14 that generates or updates the calculation criteria 152 representing an estimation model that has learned the relationship between the index data 102 and the state measurement values 151 in the past. Then, the state determination device 10 obtains the state estimated value 153 using the calculation reference 152 generated or updated by the generation unit 14, and uses the obtained state estimated value 153 to determine whether the state near the ground surface is abnormal. determine whether Therefore, the state determination device 10 can gradually improve the accuracy of determination as to whether or not the state near the ground surface is abnormal through machine learning.
- the index data 102 represents at least one of natural factors and human factors that affect the state near the ground surface.
- the natural factor represents at least one of temperature, precipitation, groundwater amount, and geology near the ground surface
- the man-made factor represents at least one of construction work on the ground near the ground surface and traffic volume near the ground surface. show.
- the state determination device 10 determines whether or not the state near the ground surface is abnormal with respect to various indexes that affect the state near the ground surface. can be determined more accurately.
- FIG. 6 is a block diagram showing the configuration of the state determination device 30 according to the second embodiment of the invention.
- the state determination device 30 includes an acquisition unit 31 , a determination unit 32 and an output unit 33 .
- the acquisition unit 31, the determination unit 32, and the output unit 33 are examples of acquisition means, determination means, and output means, respectively.
- the acquisition unit 31 acquires a state measurement value 311 representing the state of the vicinity of the ground surface by analyzing observation information 301 near the ground surface by a satellite-borne synthetic aperture radar (SAR).
- the observation information 301 is, for example, information similar to the SAR observation data 101 according to the first embodiment.
- the state measurement value 311 is, for example, information similar to the state measurement value 151 according to the first embodiment.
- the acquisition unit 31 operates, for example, in the same manner as the acquisition unit 11 according to the first embodiment.
- the determination unit 32 determines the relationship between the value of the indicator 322 and the measured state value 311 that may have a predetermined regularity 321 with the state, or the estimated state value 323 near the ground surface estimated from the value of the indicator 322. , and the state measurement value 311 satisfies a predetermined regularity 321 or not.
- the index 322 is, for example, an index indicated by the index data 102 according to the first embodiment.
- the predetermined regularity 321 is, for example, regularity as indicated by the calculation criteria 152 according to the first embodiment.
- the state estimation value 323 is, for example, information similar to 153 according to the first embodiment.
- the determination unit 32 operates, for example, in the same manner as the determination unit 12 according to the first embodiment.
- the output unit 33 determines that the state is abnormal. is output.
- the determination result information 331 is, for example, information similar to the determination result information 155 according to the first embodiment.
- the output unit 33 operates, for example, in the same manner as the output unit 13 according to the first embodiment.
- the state determination device 30 can more accurately determine whether or not the state near the ground surface is abnormal from the observation information observed by SAR.
- the reason for this is that the state determination device 30 determines that between the state estimated value 323 estimated from the index 322 and the state measured value 311 having a predetermined regularity 321 with the state near the surface of the earth to be observed, This is because it is determined whether or not the predetermined regularity 321 is satisfied.
- Each unit in the state determination device 10 shown in FIG. 1 or the state determination device 30 shown in FIG. 6 in each of the above-described embodiments can be realized by a dedicated HW (HardWare) (electronic circuit).
- HW HardWare
- FIGS. 1 and 6 at least the following configuration can be regarded as a functional (processing) unit (software module) of the software program.
- FIG. 7 exemplarily illustrates the configuration of an information processing device 900 (computer system) capable of realizing the state determination device 10 according to the first embodiment of the present invention or the state determination device 30 according to the second embodiment. It is a diagram. That is, FIG. 7 shows the configuration of at least one computer (information processing device) capable of realizing the state determination devices 10 and 30 shown in FIGS. Represents a hardware environment.
- the information processing apparatus 900 shown in FIG. 7 includes the following components as components, but may not include some of the components below.
- CPU Central_Processing_Unit
- ROM Read_Only_Memory
- RAM Random_Access_Memory
- Hard disk storage device
- a reader/writer 908 capable of reading and writing data stored in a recording medium 907 such as a CD-ROM (Compact_Disc_Read_Only_Memory); - An input/output interface 909 such as a monitor, a speaker, and a keyboard.
- the information processing device 900 having the above components is a general computer in which these components are connected via a bus 906 .
- the information processing apparatus 900 may include a plurality of CPUs 901 or may include CPUs 901 configured by multi-cores.
- the information processing apparatus 900 may include a GPU (Graphical Processing Unit) (not shown) in addition to the CPU 901 .
- the present invention which has been described with the above-described embodiment as an example, supplies a computer program capable of realizing the following functions to the information processing apparatus 900 shown in FIG.
- the function is the above-described configuration in the block configuration diagrams (FIGS. 1 and 6) referred to in the description of the embodiment, or the function of the flowchart (FIG. 5).
- the present invention is then achieved by reading the computer program to the CPU 901 of the hardware, interpreting it, and executing it.
- the computer program supplied to the apparatus may be stored in a readable/writable volatile memory (RAM 903) or a nonvolatile storage device such as ROM 902 or hard disk 904.
- the method of supplying the computer program to the hardware concerned can adopt a general procedure at present.
- the procedure includes, for example, a method of installing in the device via various recording media 907 such as a CD-ROM, and a method of downloading from the outside via a communication line such as the Internet.
- the present invention can be considered to be constituted by the code that constitutes the computer program or the recording medium 907 that stores the code.
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Abstract
Description
図1は、本発明の第1の実施の形態に係る状態判定装置10の構成を示すブロック図である。本実施形態に係る状態判定装置10は、SARによって地表付近を観測したSAR観測データ101(観測情報)から、当該地表付近の状態が異常であるか否かを判定する装置である。
図6は、本発明の第2の実施形態に係る状態判定装置30の構成を示すブロック図である。状態判定装置30は、取得部31、判定部32、及び、出力部33を備える。但し、取得部31、判定部32、及び、出力部33は、順に、取得手段、判定手段、及び、出力手段の一例である。
上述した各実施形態において図1に示した状態判定装置10、あるいは、図6に示した状態判定装置30における各部は、専用のHW(HardWare)(電子回路)によって実現することができる。また、図1及び図6において、少なくとも、下記構成は、ソフトウェアプログラムの機能(処理)単位(ソフトウェアモジュール)と捉えることができる。
・取得部11及び31、
・判定部12及び32、
・出力部13及び33、
・生成部14、
・記憶部15における記憶制御機能。
・CPU(Central_Processing_Unit)901、
・ROM(Read_Only_Memory)902、
・RAM(Random_Access_Memory)903、
・ハードディスク(記憶装置)904、
・外部装置との通信インタフェース905、
・バス906(通信線)、
・CD-ROM(Compact_Disc_Read_Only_Memory)等の記録媒体907に格納されたデータを読み書き可能なリーダライタ908、
・モニターやスピーカ、キーボード等の入出力インタフェース909。
101 SAR観測データ
102 指標データ
11 取得部
12 判定部
13 出力部
14 生成部
15 記憶部
151 状態測定値
152 算出基準
153 状態推定値
154 判定基準
155 判定結果情報
20 管理端末装置
200 表示画面
30 状態判定装置
301 観測情報
31 取得部
311 状態測定値
32 判定部
321 所定の規則性
322 指標
323 状態推定値
33 出力部
331 判定結果情報
900 情報処理装置
901 CPU
902 ROM
903 RAM
904 ハードディスク(記憶装置)
905 通信インタフェース
906 バス
907 記録媒体
908 リーダライタ
909 入出力インタフェース
Claims (10)
- 衛星搭載合成開口レーダによる地表付近の観測情報を解析することによって、前記地表付近の状態を表す状態測定値を取得する取得手段と、
前記状態との間に所定の規則性が存在しうる指標の値と前記状態測定値との関係、あるいは前記指標の値から推定される前記地表付近の状態推定値と前記状態測定値との関係が、前記所定の規則性を満たすか否かを判定する判定手段と、
前記指標の値と前記状態測定値との関係、あるいは前記状態推定値と前記状態測定値との関係が、前記所定の規則性を満たさない場合、前記状態が異常であることを表す判定結果情報を出力する出力手段と、
を備える状態判定装置。 - 前記所定の規則性は、前記指標と前記状態との間において、相関関係、線形関係、及び、前記指標に基づく前記状態のシミュレーションが可能な関係の少なくともいずれかが成立することを表す、
請求項1に記載の状態判定装置。 - 前記判定手段は、前記所定の規則性を表す算出基準を用いて前記指標から前記状態推定値を算出し、前記状態測定値と前記状態推定値との差分の絶対値が閾値よりも大きいか否かを判定し、
前記出力手段は、前記絶対値が前記閾値よりも大きい場合、前記状態が異常であることを表す前記判定結果情報を出力する、
請求項1または請求項2に記載の状態判定装置。 - 前記算出基準は、過去における前記指標と前記状態との関係を学習した推定モデルである、
請求項3に記載の状態判定装置。 - 前記推定モデルを生成あるいは更新する生成手段をさらに備える、
請求項4に記載の状態判定装置。 - 前記状態は、前記地表付近の地表面あるいは前記地表面の上に存在する構造物の位置の変位量、あるいは、前記地表付近の地表に含まれる水分量を表す、
請求項1乃至請求項5のいずれか一項に記載の状態判定装置。 - 前記指標は、所定の時期からの経過時間を表す、
請求項1乃至請求項6のいずれか一項に記載の状態判定装置。 - 前記指標は、前記状態に影響を及ぼす、自然要因及び人為要因の少なくともいずれかを表し、
前記自然要因は、前記地表付近の気温、降水量、地下水量、地質の少なくともいずれかを表し、
前記人為要因は、前記地表付近の地盤に対する工事、及び、前記地表付近の交通量の少なくともいずれかを表す、
請求項1乃至請求項7のいずれか一項に記載の状態判定装置。 - 情報処理装置によって、
衛星搭載合成開口レーダによる地表付近の観測情報を解析することによって、前記地表付近の状態を表す状態測定値を取得し、
前記状態との間に所定の規則性が存在しうる指標の値と前記状態測定値との関係、あるいは前記指標の値から推定される前記地表付近の状態推定値と前記状態測定値との関係が、前記所定の規則性を満たすか否かを判定し、
前記指標の値と前記状態測定値との関係、あるいは前記状態推定値と前記状態測定値との関係が、前記所定の規則性を満たさない場合、前記状態が異常であることを表す判定結果情報を出力する、
状態判定方法。 - 衛星搭載合成開口レーダによる地表付近の観測情報を解析することによって、前記地表付近の状態を表す状態測定値を取得する取得処理と、
前記状態との間に所定の規則性が存在しうる指標の値と前記状態測定値との関係、あるいは前記指標の値から推定される前記地表付近の状態推定値と前記状態測定値との関係が、前記所定の規則性を満たすか否かを判定する判定処理と、
前記指標の値と前記状態測定値との関係、あるいは前記状態推定値と前記状態測定値との関係が、前記所定の規則性を満たさない場合、前記状態が異常であることを表す判定結果情報を出力する出力処理と、
をコンピュータに実行させるための状態判定プログラムが格納された記録媒体。
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