WO2017010763A1 - Système d'avertissement d'effondrement utilisant une surveillance de déformation de structure, et procédé associé - Google Patents

Système d'avertissement d'effondrement utilisant une surveillance de déformation de structure, et procédé associé Download PDF

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Publication number
WO2017010763A1
WO2017010763A1 PCT/KR2016/007499 KR2016007499W WO2017010763A1 WO 2017010763 A1 WO2017010763 A1 WO 2017010763A1 KR 2016007499 W KR2016007499 W KR 2016007499W WO 2017010763 A1 WO2017010763 A1 WO 2017010763A1
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Prior art keywords
speed change
service providing
risk
change amount
providing apparatus
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PCT/KR2016/007499
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English (en)
Korean (ko)
Inventor
신경재
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경북대학교산학협력단
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
    • G06Q50/08—Construction
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B23/00—Alarms responsive to unspecified undesired or abnormal conditions

Definitions

  • the present invention compares the initial photographing image and the current photographing image of the structure to provide the collapse warning information for the structure when the deformation state of the structure is more than a predetermined reference value, thereby providing a collapse warning for the structure at an appropriate timing
  • the present invention relates to a collapse warning system and method using structural deformation monitoring.
  • construction works such as scaffolding and safety railings are installed outside the building to move the temporary material to the upper floor by tower crane.
  • the temporary material is temporarily installed for the construction or movement of the construction company during construction.
  • Measurement of the displacement of the structure is most appropriate as an index for evaluating the overall performance change of the structure. Therefore, displacement is now used as a reliable measurement value even in load test for safety diagnosis of structure.
  • a widely used method for measuring displacement of a structure is a method using a laser measuring instrument.
  • Laser-based measuring instruments are commonly used to measure displacements or vibrations in large structures or special bridges, where mechanical scanners move a laser source to measure scattered multipoints.
  • this method has the advantage of ease of use of the device, but the product is expensive and complicated procedures.
  • the present invention was created in view of the above circumstances, and when the difference between the horizontal speed change and the vertical speed change amount of the structure is greater than or equal to the preset reference value by comparing the previous image and the current image of the structure,
  • the present invention relates to a collapse warning system and method using structural deformation monitoring, which provides the collapse warning information at an appropriate timing, thereby enabling the manager to perform more efficient structure management.
  • a photographing terminal installed around the structure and photographing the region of interest of the structure, an administrator terminal for outputting the received collapse warning information, and provided from the photographing terminal Comparing the previous and current shots of the structure, calculate the horizontal speed change and the vertical speed change for the ROI, and if the difference between the horizontal speed change and the vertical speed change is greater than the reference level,
  • a collapse warning system using structural deformation monitoring comprising a service providing device for providing collapse warning information to a manager terminal.
  • the service providing apparatus may be configured to calculate a current risk based on a ratio of a horizontal speed change to a vertical speed change, and determine whether the current risk is greater than or equal to a preset reference risk.
  • a collapse warning system is provided.
  • a collapse warning system using structural deformation monitoring characterized in that the reference risk is set to a value in the range of "4-6" or "1 / 6-1 / 4".
  • the service providing device is based on a shooting period corresponding to a danger range corresponding to a current risk level among a preset multi-stage risk range.
  • a collapse warning system using structural deformation monitoring characterized in that to change the shooting cycle of the.
  • the service providing apparatus photographs the image based on the image analysis period corresponding to the risk range including the current risk level among the preset multi-stage risk ranges.
  • a collapse warning system using structure deformation monitoring is provided that is configured to perform a risk calculation process for an image.
  • a vibration sensor for detecting a vibration state is additionally installed on the structure, and the service providing apparatus changes and sets a reference level for determining a risk according to the vibration state of the structure provided from the vibration sensor.
  • the reference level value is set smaller as the vibration level is higher.
  • the service providing apparatus calculates a horizontal displacement and a vertical displacement for the ROI, and calculates a horizontal speed change and a vertical speed change based on the horizontal displacement and the vertical displacement for a predetermined time.
  • a collapse warning system using structure deformation monitoring is provided so as to provide collapse warning information to a corresponding manager terminal.
  • the first step of photographing the region of interest of the structure in the photographing terminal to provide to the service providing apparatus, and provided from the photographing terminal in the service providing apparatus In the second step of determining whether there is a change by comparing a current shot image with a previously stored shot image, when a change occurs as a result of the comparison between the current shot image and the previous shot image in the service providing apparatus, the horizontal displacement amount and the vertical direction of the region of interest are vertical.
  • a collapse warning method using strain monitoring is provided.
  • the service providing apparatus calculates a current risk based on a ratio of a horizontal speed change amount and a vertical speed change amount, and determines whether the current risk level is greater than or equal to a preset reference risk level.
  • a collapse warning method using monitoring is provided.
  • the reference risk level is provided with a collapse warning method using structural deformation monitoring, characterized in that the value is set in the range of "4 ⁇ 6" or "1/6 ⁇ 1/4".
  • the service providing apparatus when the difference between the horizontal speed change amount and the vertical speed change amount is less than a reference level, selects a shooting period corresponding to a risk range corresponding to a current risk level among a preset multi-stage risk range. If it is determined that the photographing period is different from the searched photographing period and the current photographing period, the photographing period change setting information is provided to the photographing terminal, and the photographing terminal provides a photographing period change setting report provided from the service providing device.
  • the collapse warning method using the structure deformation monitoring characterized in that for automatically changing and setting the shooting setting period based on the.
  • the service providing apparatus when the difference between the horizontal speed change amount and the vertical speed change amount is less than a reference level, selects a shooting period corresponding to a risk range corresponding to a current risk level among a preset multi-stage risk range. If it is determined that the photographing period is different by comparing the searched photographing period and the current photographing period, the corresponding photographing period change setting information is provided to the manager terminal, and the manager terminal receives a photographing period change setting report provided from a service providing device.
  • the collapse warning method using the structure deformation monitoring characterized in that the output to request the manager to change the shooting cycle of the photographing terminal is provided.
  • the service providing apparatus searches for an image analysis period corresponding to a risk range corresponding to a current risk among multiple risk ranges when the difference between the horizontal speed change and the vertical speed change is less than a reference level. Based on this, there is provided a collapse warning method using structural deformation monitoring, which calculates a horizontal displacement amount and a vertical displacement amount for the captured image.
  • the first step is to provide a vibration state of the structure to the service providing device additionally in the vibration sensor installed on the structure, the service providing device provides a reference level for determining the risk level according to the vibration state provided from the vibration sensor
  • the change setting is set, but the collapse warning method using the structure deformation monitoring, characterized in that the reference level value is set so that the higher the vibration level of the structure is provided.
  • the service providing apparatus checks whether the horizontal displacement amount or the vertical displacement amount is greater than or equal to a preset reference displacement amount, and collapses when the displacement amount of the at least one of the horizontal displacement amount or the vertical displacement amount is greater than the reference displacement amount.
  • a collapse warning method using structure deformation monitoring, which provides information to a corresponding manager terminal, is provided.
  • the collapse warning by analyzing the photographed image of the structure for various structures including temporary materials and completed buildings, the collapse warning at the appropriate timing by providing the collapse warning information to the manager terminal in the deformation state corresponding to the point of collapse risk
  • managers can perform more efficient structure management.
  • the present invention by changing the shooting cycle or the image analysis period according to the deformation state of the structure, it becomes possible to operate a more efficient system for warning of the collapse risk.
  • FIG. 1 is a diagram showing a schematic configuration of a collapse warning system using structure deformation monitoring according to a first embodiment of the present invention.
  • Figure 2 illustrates a structure (1) formed with a marker (2) applied to the present invention.
  • FIG. 3 is a view showing functionally separated internal structure of the service providing apparatus 100 shown in FIG.
  • Figure 4 illustrates a structure deformation state according to the design shape of the structure.
  • FIG. 5 is a model drawing for a collapse test of a structure, and shows a relationship between a vertical displacement amount Dy and a horizontal displacement amount Dx measured during an experiment.
  • FIG. 5 is a model drawing for a collapse test of a structure, and shows a relationship between a vertical displacement amount Dy and a horizontal displacement amount Dx measured during an experiment.
  • FIG. 6 is a flow chart for explaining the operation of the collapse warning system using the structure deformation monitoring shown in FIG.
  • FIG. 1 is a diagram illustrating a schematic configuration of a collapse warning system using structure deformation monitoring according to a first embodiment of the present invention.
  • the service providing device 100 is coupled to the photographing terminal 200 and the manager terminal 300 through a communication network.
  • the photographing terminal 200 photographs a structure to be monitored to provide a photographed image to the service providing apparatus 100.
  • the photographing terminal 200 includes a camera 210 for photographing a region of interest of the structure and a communication unit 220 for transmitting a photographed image provided from the camera 210 to the service providing apparatus 100.
  • the communication unit 220 may be configured to perform a wireless communication interface for converting the photographed image into a wireless signal to transmit to the service providing apparatus 100.
  • the photographing terminal 200 is configured to provide a photographed image of at least one or more positions of the structure to be monitored 1, as shown in FIG. 2. That is, each camera 210 is one communication unit 220 while a plurality of photographing terminals 200 are installed for one structure 1 or a plurality of cameras 210 are respectively installed at a plurality of positions of the structure 1. It is also possible to be configured in the form that is combined with).
  • various shapes, for example, quadrangular markers 2 may be formed in the region of interest of the structure 1.
  • the marker 2 may be formed at a position where collapse is expected when the structure 1 is deformed, for example, a central axis of a top plate or a form pillar, that is, a portion of a copper bar. That is, the camera 210 of the photographing terminal 200 is installed at a suitable position capable of photographing the marker 2 formed in the structure 1.
  • the photographing terminal 200 may be configured to perform a photographing operation based on a photographing period set by an administrator or a photographing period automatically set by the service providing apparatus 100.
  • the photographing terminal 200 may perform bidirectional communication with the service providing apparatus 100, and may be provided with control means for performing a photographing operation according to a photographing period.
  • the manager terminal 300 is a terminal of a manager or a company managing the monitoring target structure 1, and may be a wireless terminal or a wired terminal.
  • the manager terminal 300 is installed with an application for receiving the structure collapse warning service according to the present invention is a text display or voice display of the structure collapse warning information provided from the service providing apparatus 100 in accordance with the execution of this application Is configured to output.
  • the service providing apparatus 100 determines that a change has occurred by comparing the initial photographed image provided from the photographing terminal 200 with the current photographed image, the service providing apparatus 100 calculates a horizontal displacement amount and a vertical displacement amount for the ROI. Based on this, the horizontal speed change amount and the vertical speed change amount are calculated for a predetermined time, and if the difference between the horizontal speed change amount and the vertical speed change amount is more than the reference level, the manager terminal 300 which has previously registered structural collapse warning information (300). Is configured to provide
  • FIG. 3 is a block diagram showing functional separation of the internal configuration of the service providing apparatus 100 shown in FIG.
  • the apparatus 100 for providing a service includes a communication processor 110, an image analyzer 120, an alert processor 130, and an information storage 140.
  • the communication processor 110 performs a communication process with the photographing terminal 200 and the manager terminal 300. That is, the communication processing unit 110 provides the captured image received from the photographing terminal 200 to the image analyzing unit 120, and provides the collapse warning information provided from the warning processing unit 130 to the manager terminal 300. To provide.
  • the image analyzer 120 compares a current photographed image received from the photographing terminal 200 with a previous photographed image to determine whether there is a change, and when a change between images is confirmed, the image region 120 includes a region of interest, that is, the marker 2. Calculate the horizontal displacement and the vertical displacement relative to each other.
  • the previous photographed image may be the first photographed image initially photographed or may be a previous photographed image based on a preset time period.
  • FIG. 4 illustrates the left and right deformation state A and the up and down deformation state B according to the design shape of the structure 1, where the dashed-dotted line is the initial state of the structure and the solid line is the current state of the structure. Indicates.
  • the marker 2 for determining the deformation state of the structure 1 may be attached to, for example, the club 3 of the structure 1.
  • the image analyzer 120 calculates a horizontal displacement and a vertical displacement for the same time based on the pixel coordinate values of the marker 2 in the captured image including the marker 2.
  • the image analysis unit 120 has a horizontal displacement amount Dx, which is a difference in X coordinates, and a vertical displacement amount, which is a difference in Y coordinates, with respect to the center position of the markers 2, 2 'in the initial image and the current image. (Dy) is respectively calculated.
  • the warning processing unit 130 is a horizontal speed and a vertical speed for a predetermined time based on the horizontal displacement amount Dx and the vertical displacement amount Dy with respect to the mark 2 provided from the image analyzer 120. And calculate the current speed corresponding to the difference by calculating the horizontal speed change and the vertical speed change for a predetermined time with respect to the horizontal speed and the vertical speed.
  • the warning processor 130 compares the calculated current risk with a reference risk, and provides the collapse warning information to the manager terminal 300 through the communication processor 110 when the currently calculated risk is greater than or equal to the reference risk.
  • the collapse alert information may include a warning message and the collapse warning image position.
  • Equation 1 shows a risk calculation process
  • Is the displacement in the X direction at time i Is the displacement in Y direction at time i, Is the velocity in the X direction at time i, Is the velocity in the Y direction at time i, Is the acceleration in the X direction at time i, Is the acceleration in the Y direction at time i, Is the ratio of the accelerations in the X and Y directions at time i.
  • the risk is the ratio of the acceleration in the X, Y direction as shown in Equation 1 above ( Is calculated as In this case, the risk of Equation 1 is calculated as the horizontal speed change amount with respect to the vertical speed change amount, but may be calculated as the vertical speed change amount with respect to the horizontal speed change amount.
  • the reference risk which is a criterion for providing collapse warning information
  • the warning processing unit 130 provides the collapse warning information to the manager terminal 300 when the difference between the vertical speed change amount and the horizontal speed change amount is "4 times to 6 times" or more.
  • the horizontal reference risk is “4 to 6” based on an experimental result in which the deformation of the structure is rapidly performed after the difference between the vertical speed change and the horizontal speed change tends to be higher than a certain ratio. Or "1/6 to 1/4".
  • FIG. 5 (A) is a schematic view of an experimental model, in which collapse experiments are performed by applying an arbitrary force (F) at the top.
  • (B) and (C) in FIG. 5 are experimental results for (A), (B) shows the vertical and horizontal displacements of the test specimen when the collapse time is 60 seconds, and (C) the horizontal displacement amount immediately before collapse.
  • the enlarged view shows an area larger than the vertical displacement by a certain ratio.
  • the warning processor 130 may set an image capturing period of the photographing terminal 200 based on the current risk. That is, the warning processing unit 130 compares the multi-stage risk range stored in the information storage unit 140 to which the current risk level belongs, and searches for the image capturing period corresponding to the corresponding risk range afterwards. It may be configured to provide to the photographing terminal 200 through the communication processing unit 110.
  • the warning processing unit 130 may be configured to change the subsequent image analysis period based on the current risk. That is, the warning processing unit 130 compares the risk range of the multi-stage stored in the information storage unit 140 to which the current risk degree belongs, and then searches for an image analysis period corresponding to the corresponding risk range after the image analysis period.
  • the image analysis unit 120 may be provided to change the image analysis period.
  • warning processing unit 130 may be configured to include information output means (not shown), and may be configured to display or output audio warning information and image analysis result information.
  • the information storage unit 140 stores various information related to the collapse warning.
  • the information storage unit 140 may include an initial photographing image for each identification information of the photographing terminal 200 installed in the structure 1, photographing terminal information including an initial photographing date, a photographing period, a current risk, and a photographing date; Information related to the collapse warning including the shooting cycle or image analysis period information by each risk range and the collapse warning message is stored.
  • the shooting cycle or the image analysis cycle for each risk range is the initial stage with the lowest risk, the shooting cycle or the image analysis cycle is set to the longest, for example, "30 days", the late stage when the risk range is close to the reference level
  • the photographing period or the image analysis period may be set as the shortest, for example, in units of "1 day".
  • At least one or more markers 2 of the collapse warning object structure 1 are formed, and the photographing terminal 200 is located at a suitable position to photograph an area in which the markers 2 are included. ) Is installed.
  • the photographing terminal 200 photographs a region of interest of the structure 1 on which the marker 2 is formed at a predetermined interval, and provides the photographing terminal 200 to the service providing apparatus 100.
  • the photographing period may be arbitrarily set by the user or may be provided from the service providing apparatus 100.
  • the service providing device 100 compares the current photographed image with the previously photographed initial photographed image and determines whether there is a change (ST20).
  • the service providing apparatus 100 determines that a change has occurred in the current photographed image at step ST20, the service providing apparatus 100 calculates a horizontal displacement amount and a vertical displacement amount with respect to the ROI, that is, the marker 2 (ST30).
  • the service providing apparatus 100 calculates a horizontal speed change amount and a vertical speed change amount for a predetermined time based on the horizontal displacement amount and the vertical displacement amount with respect to the marker 2 calculated in step ST30.
  • the risk is calculated based on the difference between the horizontal speed change and the vertical speed change (ST40).
  • the risk calculation method is the same as Equation 1 above. That is, the risk is calculated as the ratio of the vertical speed change amount and the vertical speed change amount for a predetermined time t.
  • the service providing device 100 compares the risk calculated in step ST40 with a preset reference risk level (ST50), and provides the collapse warning information to the corresponding administrator terminal 300 (ST60).
  • the service providing device 100 searches for a captured image period corresponding to the risk range including the current risk in the preset multistage risk range (ST70).
  • the service providing apparatus 100 compares the currently detected photographed image period and the currently set photographed image period to change and set the photographing period of the photographing terminal 200 to the photographed image period detected in step ST70 when the photographed image period is different.
  • Request (ST80).
  • the service providing apparatus 100 provides the shooting period change setting request information to the administrator terminal 300 to allow the administrator to change the shooting cycle of the corresponding shooting terminal 200 or communicate with the shooting terminal 200. It is possible to change and set the shooting cycle of the photographing terminal 200 automatically.
  • the service providing device 100 searches for an image analysis period corresponding to the risk range including the current risk of the preset multi-stage risk range; Then, it may be operated to determine the risk by performing an image analysis process on the photographed image provided from the photographing terminal 200 based on this.
  • the collapse warning information is provided at the point of time, but for detecting the vibration state on the structure.
  • a vibration sensor (not shown) may be further installed, and the service providing device may be configured to change and set a reference risk according to the vibration state of the structure provided from the vibration sensor. In other words, the higher the vibration level of the structure, the smaller the reference risk value may be set.
  • the management warning of the structure by analyzing the photographed image of the structure to provide the collapse warning information to the manager terminal when the horizontal displacement amount is greater than a certain multiple of the vertical displacement amount, the management warning of the structure more efficiently can do.
  • the present invention when the horizontal speed change amount and the vertical speed change amount of the structure increase similarly at the same time, even if the displacement amount in each direction is more than a certain level, the current risk is calculated to be low and the collapse warning information is appropriately timed to the manager terminal. May not be provided.
  • the horizontal displacement amount or the vertical displacement amount calculated through image analysis is equal to or greater than a preset reference displacement amount, and thus the displacement amount of at least one of the horizontal displacement amount or the vertical displacement amount is determined as a reference. If the displacement amount is higher than that, it is also possible to provide collapse warning information to the relevant manager terminal without calculating the risk. At this time, the current risk calculation is performed when both the horizontal displacement and the vertical displacement are less than the reference displacement.

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Abstract

La présente invention concerne un système d'avertissement d'effondrement utilisant une surveillance de déformation de structure, et un procédé associé, qui compare une image photographiée initiale et une image photographiée courante d'une structure, et fournit des informations d'avertissement d'effondrement pour la structure correspondante lorsque l'état de déformation de la structure est supérieur ou égal à une valeur de référence prédéterminée, de manière à fournir un avertissement d'effondrement pour la structure à un moment approprié. Le système d'avertissement d'effondrement utilisant une surveillance de déformation de structure et le procédé associé selon la présente invention comprennent : un terminal de photographie qui est installé autour d'une structure de façon à photographier une zone d'intérêt de la structure correspondante ; un terminal de gestionnaire pour délivrer en sortie des informations d'avertissement d'effondrement reçues ; et un dispositif de fourniture de service pour comparer une image photographiée précédente et une image photographiée courante de la structure correspondante, fournies par le terminal de photographie, calculer une variation de vitesse horizontale et une variation de vitesse verticale pour la zone d'intérêt, respectivement, et fournir des informations d'avertissement d'effondrement de structure au terminal de gestionnaire lorsque la différence entre la variation de vitesse horizontale et la variation de vitesse verticale est supérieure ou égale à un niveau de référence.
PCT/KR2016/007499 2015-07-10 2016-07-11 Système d'avertissement d'effondrement utilisant une surveillance de déformation de structure, et procédé associé WO2017010763A1 (fr)

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