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EP-3889356-B1 - STRUCTURE REPAIR METHOD SELECTION SYSTEM, REPAIR METHOD SELECTION METHOD, AND REPAIR METHOD SELECTION SERVER

EP3889356B1EP 3889356 B1EP3889356 B1EP 3889356B1EP-3889356-B1

Inventors

  • HORITA SHUHEI

Dates

Publication Date
20260506
Application Date
20191031

Claims (12)

  1. A structure repair method selection system comprising: a repair evaluation unit (105) that obtains an evaluation score for a structure from an inspection history of the structure after repair; a database (110) that has data of a captured image of the structure before the repair, an adopted repair method, a repair time, the inspection history of the structure after the repair, and the evaluation score; an image acquisition unit (115) that acquires a captured image of a target structure to be repaired; an actual size information acquisition unit (120) that acquires an actual size of a characteristic portion of the target structure in the captured image or an actual length of the target structure; a damage detection unit (125) that detects damage from the captured image acquired by the image acquisition unit, and calculates a degree of the damage, based on information acquired by the actual size information acquisition unit; a similar damage extraction unit (130) that determines a degree of similarity of the damage detected by the damage detection unit (125) to damage of the structure in the database (110), and extracts one or more kinds of similar damage for which the degree of similarity is high; and a repair method presentation unit (135) that presents, based on the evaluation score, repair methods adopted for the kinds of similar damage extracted by the similar damage extraction unit (130), wherein the evaluation score is obtained from chronological changes in a damage rank, a countermeasure class, and a degree of soundness of the structure and chronological changes in a position of the damage and the degree of the damage, or the evaluation score is obtained based on progress history of a degree of soundness of the structure after repair.
  2. The structure repair method selection system according to claim 1, wherein the repair method presentation unit (135) presents a repair method for which the evaluation score is higher than or equal to a predetermined score from among the repair methods, or presents the repair methods in descending order of the evaluation score.
  3. The structure repair method selection system according to claim 1 or 2, wherein the database (110) has damage information of the structure, the damage information including a type of the damage, a position of the damage, and the degree of the damage.
  4. The structure repair method selection system according to claim 3, further comprising: an information acquisition unit (140) that acquires at least one or more pieces of information of a damage cause, structure information, environment information, or history information of the target structure, wherein the database (110) has at least one or more pieces of information of a damage cause, structure information, environment information, or history information, and the similar damage extraction unit (130) determines the degree of similarity, based on the at least one or more pieces of information of the damage cause, the structure information, the environment information, or the history information acquired by the information acquisition unit in addition to the damage information.
  5. The structure repair method selection system according to any one of claims 1 to 4, wherein the image acquisition unit (115) acquires a group of images obtained by capturing images of segments of the target structure, and the image acquisition unit (115) has a panoramic combination unit that performs panoramic combination processing on the group of images.
  6. The structure repair method selection system according to any one of claims 1 to 5, wherein the database (110) includes a repair time for the structure, and the repair method presentation unit (135) presents the repair time in addition to the repair method.
  7. The structure repair method selection system according to any one of claims 1 to 6, wherein the repair method presentation unit (135) presents a repairing material in addition to the repair method.
  8. The structure repair method selection system according to any one of claims 1 to 7, wherein the image acquisition unit (115) acquires chronological images of the target structure.
  9. The structure repair method selection system according to claim 8, wherein the similar damage extraction unit (130) determines the degree of similarity, based on chronological changes in a position of the damage and the degree of the damage in the chronological images, and extracts the similar damage.
  10. The structure repair method selection system according to any one of claims 1 to 9, wherein the similar damage extraction unit (130) weights each piece of information.
  11. A structure repair method selection method comprising: a repair evaluation step of, with a repair evaluation unit, obtaining an evaluation score for a structure from an inspection history of the structure after repair; an image acquisition step of, with an image acquisition unit, acquiring a captured image of a target structure to be repaired; an actual size information acquisition step of, with an actual size information acquisition unit, acquiring an actual size of a characteristic portion of the target structure in the captured image or an actual length of the target structure; a damage detection step of, with a damage detection unit, detecting damage from the captured image acquired in the image acquisition step, and calculating a degree of the damage, based on information acquired in the actual size information acquisition step; a similar damage extraction step of, with a similar damage extraction unit, by using a database having data of a captured image of the structure before the repair, an adopted repair method, a repair time, the inspection history of the structure after the repair, and the evaluation score, determining a degree of similarity of the damage detected in the damage detection step to damage of the structure in the database, and extracting one or more kinds of similar damage for which the degree of similarity is high; and a repair method presentation step of, with a repair method presentation unit, based on the evaluation score, presenting repair methods adopted for the kinds of similar damage extracted in the similar damage extraction step, wherein the evaluation score is obtained from chronological changes in a damage rank, a countermeasure class, and a degree of soundness of the structure and chronological changes in a position of the damage and the degree of the damage, or the evaluation score is obtained based on progress history of a degree of soundness of the structure after repair.
  12. A structure repair method selection server (300) that is connected to a user terminal (400) via a network and selects a repair method for a target structure to be repaired, the structure repair method selection server comprising: a repair evaluation unit (105) that obtains an evaluation score for a structure from an inspection history of the structure after repair; a database (110) that has data of a captured image of the structure before the repair, an adopted repair method, a repair time, the inspection history of the structure after the repair, and the evaluation score; an image acquisition unit (115) that acquires a captured image of the target structure; an actual size information acquisition unit (120) that acquires an actual size of a characteristic portion of the target structure in the captured image or an actual length of the target structure; a damage detection unit (125) that detects damage from the captured image acquired by the image acquisition unit, and calculates a degree of the damage, based on information acquired by the actual size information acquisition unit; a similar damage extraction unit (130) that determines a degree of similarity of the damage detected by the damage detection unit to damage of the structure in the database, and extracts one or more kinds of similar damage for which the degree of similarity is high; a repair method presentation unit (135) that presents, based on the evaluation score, repair methods adopted for the kinds of similar damage extracted by the similar damage extraction unit; and a communication unit (305) having a reception unit (306) that receives the captured image from the user terminal (400) via the network, and a transmission unit (307) that transmits the repair methods presented by the repair method presentation unit (135) to the user terminal (400), wherein the evaluation score is obtained from chronological changes in a damage rank, a countermeasure class, and a degree of soundness of the structure and chronological changes in a position of the damage and the degree of the damage, or the evaluation score is obtained based on progress history of a degree of soundness of the structure after repair.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure repair method selection system, a structure repair method selection method, and a structure repair method selection server. More particularly, the present invention relates to a repair method selection system, a repair method selection method, and a repair method selection server that select a repair method on the basis of a state such as damage of a structure such as a bridge. 2. Description of the Related Art Inspections need to be periodically performed on social infrastructure such as bridges. In a bridge repair design, an engineer determines a repair time and selects a repair method on the basis of a state of damage, a cause of the damage, and the like obtained in these inspections. Since advanced skills and experience are required to identify damage to be repaired, identify an appropriate repair time, and select an appropriate repair method, the results vary among inspectors (diagnosis-making persons). Thus, appropriate repair is not necessarily made. Shortage of skilled engineers is also a factor that hinders appropriate repair from being made. In addition, in terms of budget management, if a method actually performed differs from the repair method selected at the time of the repair design, a deviation from budget occurs, which leads to unsuccessful budget management. As a system for creating a repair plan, for example, WO2017/051550A discloses a repair-planning assisting system, a repair-planning assisting method, and a repair-planning assisting program for creating a repair plan for a target structure by receiving an inspection result and comparing the inspection result with past inspection and repair results of a reference structure. In this manner, creation of an objective and highly accurate repair plan can be efficiently assisted. EP 3 355 259 A1 relates to a repair plan drafting support system, which receives inspection data from an inspection device and uses it to retrieve specification information about the target structure. US 2018/189750 A1 discloses a technique that predicts damage progression and determines a maintenance priority level, using positional data and historical damage information. EP 3 396 358 A1 discloses generating damage information by vectorizing damage detected in inspection images, analyzing this data using a damage progression model to determine the current degree of damage, and calculating the speed of damage progression by comparing degrees of damage from images taken at different times. SUMMARY OF THE INVENTION However, in the repair-planning assisting system and the like described in WO2018/051550A, repair result information of the reference structure similar to the inspection result information is displayed and a past post-repair inspection result is not reflected. Therefore, it cannot be determined whether the repair method is appropriate in terms of a long-term evaluation after the repair. The present invention is made in view of such a circumstance, and an object of the present invention is to provide a structure repair method selection system, a structure repair method selection method, and a structure repair method selection server that enable selection of a more appropriate repair method. The present invention is defined by independent claims 1, 11 and 12. Further preferable embodiments are given in the dependent claims. The structure repair method selection system according to the present invention has the repair evaluation unit, and the database includes repair evaluation scores obtained by the repair evaluation unit. When a repair method is selected, the repair method is selected in consideration of these evaluation scores. Consequently, the repair method for damage detected from an acquired image can be appropriately selected. The same advantage can be obtained also with the structure repair method selection method and the structure repair method selection server. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an external view of a bridge viewed from below;Fig. 2 is a block diagram illustrating a configuration of a structure repair method selection system;Fig. 3 is a diagram illustrating a chronological change in a degree of soundness achieved by a repair method A;Fig. 4 is a diagram illustrating a chronological change in a degree of soundness achieved by a repair method B;Fig. 5 is a graph illustrating a concept of determining a degree of similarity of damage;Fig. 6 is a diagram describing a method for presenting repair methods;Fig. 7 is a flowchart of a structure repair method selection method; andFig. 8 is a block diagram illustrating a configuration of a structure repair method selection server. DESCRIPTION OF THE PREFERRED EMBODIMENTS A structure repair method selection system, a structure repair method selection method, and a structure repair method selection server according to one embodiment of the present invention will be described below with referen