KR20180011600A - Detection system and method for sinkhole using of infrared rays camera - Google Patents

Abstract

The present invention relates to a system and a method to detect a sinkhole using a thermal image camera, comprising: a ground environment information collection unit to collect ground environment information of a point of interest (POI); a detection target extraction unit to extract detection target information including detection area and time information corresponding to a range of a sinkhole detection environment condition preset to detect a sinkhole from the collected ground environment information; a thermal image photographing unit to photograph a detection area with an infrared thermal image camera in a detection time based on the extracted detection target information; and a sinkhole detection unit to acquire sinkhole information through a photographed infrared image. As such, the infrared thermal image camera is used; thereby being able to detect the sinkhole at low costs and in a quick and efficient method, acquire the sinkhole information of a high resolution from optimal detection target information, and confirm the presence of and monitor the sinkhole.

Description

TECHNICAL FIELD [0001] The present invention relates to a detection system and a detection method of a ground pupil using an infrared thermography camera,

The present invention relates to a ground pore detection system and a detection method, and more particularly, to a system and a detection method capable of detecting a ground pore using a low cost, quick and efficient method using an infrared ray camera.

A ground hole or a sinkhole is a hole formed in an underground space by sinking, and can be classified into a dissolvable sinkhole, a sinkhole sinkhole, and a collapsible sinkhole. Of these, It is a collapsible sink hole.

The collapse-type sinkhole occurs mainly in a thick clay layer, where an empty space formed underneath is suddenly collapsed due to the adhesive force of the clay for a certain period of time.

These ground pores or sinkholes usually occur when groundwater melts rocks or sudden changes in groundwater flow. When groundwater causes an empty space in the rock, the upper soil and groundwater fill the empty space.

After the ball is made, it collapses. In addition, the sink hole is caused by excessive use of groundwater, disturbance of groundwater flow during the development project, and leakage of water and sewerage pipes.

Over-use of groundwater can cause sink holes to be formed when the groundwater is drained to the surface after the development project or development process, or when the existing groundwater flow changes, , And even when backfilling is not completed on the excavated surface during development. Finally, if there is a leak in the water and sewage pipes, the cohesion of the clay is weakened, and sinkholes may occur due to sedimentation of water and soil.

The cause of the sinkhole in the metropolitan area is the result of a combination of insufficiency of construction approval and management system, deterioration of water supply and sewage facilities, and lowering of groundwater level. The approval of the large-scale development project that caused the sinkhole disturbance caused the disturbance of the groundwater flow was insufficient. Considering the fact that the drainage management of the underground water supply and sewerage facilities was insufficient, the main cause of accelerating sinkhole, do.

Recently, the problem of the depression of the ground cavities has spread beyond engineering problems to social problems. This problem is recognized as a safety problem of society, and the need for sensing technology of ground pores is emerging.

Conventionally, various types of test methods have been used to investigate the location and size of cavities existing in the basement. The most accurate method of investigation is the drilling survey. Drilling survey can directly investigate the risk of cavitation or collapse, but it is not only difficult to conduct comprehensive survey on a wide range of objects, but also has the disadvantage of causing collapse due to drilling.

The most commonly used physical exploration in the past is GPR (Ground Penetrating Radar) survey, elastic wave refraction, electrical resistivity survey, seismic tomography survey, and elastic wave reflection.

The GPR probe is a probe method in which an electromagnetic wave emitted from a transmitting antenna meets an object having a different electromagnetic property, detects a reflected signal from a receiving antenna, processes it, processes it in a sectional view, and analyzes the internal state of the object. When the electromagnetic wave travels inside the object and reaches the cavity, the phase of the reflected wave changes. The position and size of the cavity can be determined by analyzing this phase. However, such a device is disadvantageous in that it is large or expensive and its utilization is limited.

Japanese Unexamined Patent Application Publication No. 2005-283383 (Published Date: October 13, 2005) Korean Registered Patent No. 10-1531697 (Registered Date: June 19, 2015)

The ground pore detection system and detection method using the infrared ray camera according to the present invention have the following problems.

First, the present invention is to provide a system and a detection method that can detect a ground pupil using a low cost, quick and efficient method using an infrared thermal camera.

Second, the present invention is to provide a ground porthole detection system and a detection method capable of acquiring and analyzing existence and non-existence of ground pore information of a high resolution with respect to optimum survey target information.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide an apparatus and method for controlling the same.

According to a first aspect of the present invention, there is provided a ground porthole detection system using an infrared ray camera, comprising: a ground environment information collecting unit for collecting ground environment information of a region of interest; A surveying object extracting unit for extracting surveying object information including surveying area and surveying time information within a predetermined ground pavement survey environmental condition range for ground pavement surveying in the collected ground environmental information; A radiographic image capturing unit for capturing an exploration area with an infrared radiographic camera at a time of exploration based on the extracted information to be surveyed; And a ground pupil detection unit for acquiring the ground pupil information through the photographed infrared image.

Preferably, the geo-environmental information collecting unit collects geo-environment information of a region of interest in real time or periodically from a database of an external organization using wired or wireless communication, , Geothermal information, soil information, and concrete information.

Preferably, the soil information and the concrete information include density, specific heat, and conductivity information, and the solar radiation value absorbed on the ground surface of the area is preferably 2 W / m 2 or more .

In addition, it is preferable that the ground temperature of the region is 10 ° C or higher, and the ground pupil detection unit is a three-dimensional simulation image including the ground pupil information .

A second aspect of the present invention is summarized as a ground porthole detection method using an infrared thermal camera, comprising the steps of: (a) detecting a ground environment information from a ground surface including at least one of solar radiation information, geothermal information, soil information, Collecting environmental information; (b) extracting exploration target information including the exploration area and the exploration time information within the predetermined ground pavement exploration environmental condition range for the ground pavement exploration in the collected ground environment information collected by the exploration object extracting part; (c) photographing the exploration area with an infrared camera at a time of exploration based on the extracted information to be surveyed; And (d) acquiring the ground pupil information through the infrared image of the ground pupil detection unit.

Preferably, the step (a) includes the step of collecting, in real time or periodically, the geo-environmental information of a region of interest from a database of an external organization using wired or wireless communication, ), It is preferable that the solar radiation value absorbed in the ground surface of the area is not less than 2 W / m < 2 >

In addition, it is preferable that a ground temperature of the region is 10 ° C or higher in the range of the geophysical exploration environment condition, and the step (d) And displaying the converted image.

A third aspect of the present invention features a computer program stored in a computer readable medium in combination with hardware for executing the method of detecting a ground pore using the above-described infrared radiographic camera.

The ground pore detection system and the detection method using the infrared ray camera according to the present invention have the following effects.

First, the present invention provides a ground pupil detection system and a detection method capable of detecting and monitoring the existence of a ground pupil with a fast, efficient, and low unit cost detection cost through an optimum object information to be inspected using an infrared thermal camera .

Second, the present invention provides a ground porthole detection system and a detection method capable of three-dimensionally confirming the thickness of the ground surface, the depth, the width, and the temperature information of the ground surface by converting the infrared image acquired under the optimum survey condition into a 3D image and displaying do.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

FIG. 1 is a block diagram illustrating a ground pore detection system using an infrared ray camera according to an embodiment of the present invention. Referring to FIG.
2 is a flowchart illustrating a method of detecting a ground pore using an infrared radiographic camera according to an embodiment of the present invention.
3 is a display example of the ground porphylax information displayed by the ground porch detection system using the infrared radiographic camera according to the embodiment of the present invention.

Further objects, features and advantages of the present invention will become more apparent from the following detailed description and the accompanying drawings.

Before describing the present invention in detail, it is to be understood that the present invention is capable of various modifications and various embodiments, and the examples described below and illustrated in the drawings are intended to limit the invention to specific embodiments It is to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Further, terms such as " part, "" unit," " module, "and the like described in the specification may mean a unit for processing at least one function or operation.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of a ground pore detection system 100 using an infrared ray camera according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a ground pore detection method using an infrared ray camera according to an embodiment of the present invention. Fig.

As shown in FIG. 1, the ground porthole detection system 100 using the infrared ray camera according to the embodiment of the present invention includes a ground environment information collection unit 110 for collecting ground environment information of a region of interest; A survey object extraction unit (120) for extracting survey object information including survey area and survey time information within a predetermined ground pavement survey environmental condition range for ground pavement survey in the collected ground environmental information; A thermal imaging unit (130) for imaging the exploration area with the infrared imaging camera at the exploration time based on the extracted information to be surveyed; And a ground pore detector 140 for acquiring the ground pore information through the photographed infrared image.

As shown in FIG. 2, the ground porthole detection method using the infrared ray camera according to the present invention is characterized in that (a) the ground environment information collecting unit 110 collects solar radiation information, geothermal information, soil information, Collecting the geo-environmental information including at least one of the information; (b) extracting an object to be explored including exploration area and exploration time information within a range of pre-set ground excavation environmental conditions for exploration of ground pores in the collected ground environment information; (c) capturing the exploration area on the basis of the extracted information to be inspected by the infrared radiographing unit 130 with an infrared radiographic camera at the time of exploration; And (d) the ground pupil detection unit 140 acquires the ground porch information through the photographed infrared image.

As described above, in the embodiment of the present invention, various ground environmental information such as solar radiation information, geothermal information, soil information, and concrete information of a region of interest is collected, and a range of environmental conditions of the geophysical exploration is set by a preset optimum thermal image sensing. Obtain the information of the optimum exploration area corresponding to the condition range and the exploration target of the exploration time. Then, the ground surveying system 100 using the infrared ray camera which takes the optimum exploration area with the infrared radiographic camera at the optimum exploration time and acquires the information of the ground pod based on the photographed image in accordance with the obtained exploration target information ).

In the embodiment of the present invention, an infrared ray camera is used to detect and confirm the ground pores. This is because the temperature generated in the ground or the ground is significantly different between the case where there is a ground pore and the case where there is no ground pore, Unlike the physical exploration used in conventional mineral exploration, it has the advantage of non-contact type non-destructive inspection, and the installation cost of the exploration system is low.

Generally, the temperature of the ground or the ground is determined by the surrounding environment such as the temperature of the atmosphere, the solar heat, and the material properties of the soil. In the case of the ground cavity occupying an empty space near the surface, I have. Non-contact and non-destructive IR thermal cameras are used in embodiments of the present invention to verify visually and precisely these differences to determine the presence of ground pores.

An infrared camera, which is one type of non-contact thermometer used in the embodiment of the present invention, is basically composed of a lens, a filter, an infrared sensor, and a signal processing unit. The infrared rays radiated from the object are focused by the lens, and the iris removes unnecessary edge signals among infrared rays incident through the lens. Next, the infrared filter passes only the desired infrared wavelength band to the infrared sensor, converts the optical signal into an electric signal from the infrared sensor, and converts the electrical signal into temperature in the signal processor.

The principle of infrared temperature measurement uses a method of estimating the temperature of an object by measuring the radiation amount of a desired wavelength region of infrared rays emitted from a target object and comparing the amount of radiation of the blackbody with a relative value of the object, The radiation law is used to detect or measure the temperature of the object.

In general, the heat transfer method of an object is carried out in three ways: Conduction, Convection, and Radiation. When heat and heat balance are broken, heat is transferred from a high temperature object to a low temperature object. .

In order to analyze the heat transfer problem, various physical property values of the substance are required. These physical property values are generally referred to as thermophysical property values, and two different types of transport property values and thermodynamic property values Physical property value. The transfer property value includes diffusion coefficient factors such as thermal conductivity k for heat transfer. On the other hand, the thermodynamic property value defines the equilibrium state of the system. The product of the density (ρ) and the specific heat (Cp), commonly referred to as the volumetric heat capacity, represents the degree to which the substance is capable of storing thermal energy.

When measuring the temperature of an object surface in a non-contact manner using infrared rays, there are three types of energy such as reflection, transmission, and radiation. Only energy emitted by radiation is used to measure the surface temperature of the object. Therefore, when measuring the temperature with an infrared measuring device, the effect of reflection and transmission should be removed and measured only by energy from radiation. In general, in the case of an object which is not transparent, there is almost no effect of transmission, and only the effect of reflection can be taken into account in error.

Therefore, in the embodiment of the present invention, since the infrared radiographic camera is used to detect the ground pores, the range of the ground pavement exploration environment condition in which the heat transfer characteristic that generates the energy radiated from the ground is well set is set, The present invention provides a detection system and a method for acquiring and detecting ground porcelain information quickly and efficiently by photographing a target area with an infrared radiographic camera according to an exploration area and an exploration time.

Hereinafter, the method of detecting the ground pore using the ground pore detection system 100 using the infrared ray camera according to the embodiment of the present invention will be described in detail with reference to FIG. 1 and FIG.

In the step (a), the geo-environmental information collecting unit 110 collects the geo-environmental information of the interested area in real time or periodically from a database of the external organization using wired or wireless communication.

Here, it is preferable that the geo-environmental information includes at least one of solar radiation information, geothermal information, soil information, and concrete information of a region of interest. As described above, This is because environmental information such as solar radiation information and ground temperature, which are the causes of radiation energy of the ground, are important because environmental information considering the heat transfer characteristics of the ground and the ground information are important.

In addition, the soil information and the concrete information preferably include density, specific heat, and conductivity information. This is because the heat transfer characteristic is a thermophysical or thermochemical property value.

The geo-environment information collecting unit 110 includes a wired / wireless communication apparatus and a database capable of storing data. The geo-environment information collecting unit 110 may be a computing environment in which various environmental information of an external organization can be collected in real- Device.

In the step (b), the survey object extraction unit 120 extracts the survey object information from the collected ground environment information, which is included in the survey area and the survey time information within the pre-set ground porthole survey environmental condition range for the ground pore survey, And extracting the search target information including the search target information.

Herein, in setting the range of the environmental condition for the geophysical exploration, as described above, in applying the system and method for detecting the ground pupil through the temperature image by the energy generated or radiating from the ground by using the infrared radiographic camera , An optimum range of the optimum exploration environment condition in which the ground porch is best detected by the infrared radiographic camera is set in advance, and among the large amount of the ground environment information collected by the ground environment information collection unit 110, To acquire and measure or detect the exploration time.

The core conditions in the scope of the geophysical exploration environmental conditions applied in the embodiments of the present invention are solar radiation and geothermal conditions based on the radiant energy of the ground in view of the infrared thermography measurement principle. In other words, since the solar radiation amount and the temperature are above a certain condition, the ground pupil can be clearly displayed by the infrared ray camera, and the ground pupil can accurately acquire various information such as the depth and the width.

Accordingly, in the embodiment of the present invention, the condition of solar radiation in the range of the environmental conditions of the ground penetrating exploration is that the solar radiation absorbed by the ground surface of the area is 2W / m 2 or more and the ground temperature of the region is 10 ° C or more Do. This is because there is a limit to use the environmental information as a parameter for the optimum condition in the case of the environment information in which the change value of the thermal property value (heat transfer coefficient, specific heat, density, thickness, etc.) of soil, air, Because solar radiation information, which varies easily depending on weather, such as time and weather, and air temperature, wind speed and ground temperature information, can be used as the key parameters for optimum conditions.

In one embodiment, the condition of the solar radiation value absorbed to the ground in the geotechnical exploration environmental condition range is possible if the maximum solar radiation value received by the surface at 2W / m 2 or more, and the condition of the ground temperature is 10 ° C Up to the maximum temperature value is possible.

More specifically, as an embodiment of the present invention, the following range of the ground porthole survey environmental conditions can be set.

In the case of solar radiation conditions, the solar radiation absorbed on the ground in the area is above 2W / ㎡, and the ground temperature of the area can be set to 10 ℃ or higher.

In case of Soil, the density is 1700 kg / m 3, the specific heat is 740 J / kg ° C, the conductivity is 0.16 J / m ° C, and the air condition The density is 1.2 kg / m 3, the specific heat is 1003 J / kg ° C, the conductivity is 0.026 J / m ° C, and in the concrete condition, the density is The specific heat is 750 J / kg ° C, the conductivity is 1.8 J / m ° C, and the solar radiation condition can be set at 2 W / m 2.

Here, the air condition is a condition variable that is predicted by the interpretation of the air condition inside the ground pore, not the condition of the external air (the ground air condition related to the heat transfer at the surface of the earth, such as the wind speed and the air misdirection). The conditions at this time are physical properties such as density of air, specific heat and thermal conductivity, and the air temperature inside the ground cavity is determined by soil, concrete, geothermal, and so on.

In this way, the range of the geophysical exploration environment condition that can measure or detect the optimum geophysical pore can be set, and the exploration target extracting unit 120 can acquire the geophysical exploration environment range from the collected geospatial information, The search time is retrieved and extracted.

(c) is a step of photographing with an infrared thermal imaging camera, wherein an exploration area is photographed at an exploration time with an infrared thermal imaging camera in accordance with the exploration area and the exploration time information extracted as the object information extracted in step (b) .

Thus, by securing the exploration area and the probe time within the range of conditions for optimal detection, the infrared thermography camera can be moved and quickly and accurately photographed, thereby greatly improving the detection time and efficiency, The equipment will be able to identify and monitor the presence of ground pockets quickly and accurately.

In other words, it is necessary to detect an area where a sinkhole is likely to occur in order to prevent an accident caused by a depression of a road or the like caused by a ground puppet, which has recently occurred, in a conventional geophysical method. And the efficiency is very low. Therefore, there is a great advantage that the existence of the ground pupil can be confirmed and monitored with a fast, efficient and low unit price detection cost through the optimum information to be exploited by using the infrared thermal camera.

In the step (d), the ground pupil detection unit 140 obtains the ground pupil information through the infrared image photographed in the step (c). In this step, the photographed infrared image can be converted into a three-dimensional simulation image including the ground pupil information and displayed.

FIG. 3 is a display example of the ground pupil information displayed by the ground-based pupil-detection system 100 using the infrared radiographic camera according to the embodiment of the present invention. As shown in FIG. 3, the infrared image captured and acquired by the ground pore detection unit 140 is converted into a 3D image through a 3D simulation algorithm or a model and displayed, whereby the thickness of the ground surface, the depth, The information can be checked in three dimensions.

As another embodiment of the present invention, a computer program stored in a computer-readable medium may be stored in a computer-readable medium in combination with hardware in order to execute the method of detecting ground pneumonia using the above-described infrared radiographic camera.

That is, the apparatus according to the embodiment of the present invention can be implemented as a computer-readable code on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the recording medium include ROM, RAM, optical disk, magnetic tape, floppy disk, hard disk, nonvolatile memory and the like. The computer-readable recording medium may also be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner.

The embodiments and the accompanying drawings described in the present specification are merely illustrative of some of the technical ideas included in the present invention. Accordingly, the embodiments disclosed herein are for the purpose of describing rather than limiting the technical spirit of the present invention, and it is apparent that the scope of the technical idea of the present invention is not limited by these embodiments. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: ground pore detection system 110: ground environmental information collection unit
120: object to be extracted 130: thermal imaging unit
140: Ground pore detection unit

Claims (13)

A ground environment information collecting unit for collecting the ground environment information of the interested area;
A surveying object extracting unit for extracting surveying object information including surveying area and surveying time information within a predetermined ground pavement survey environmental condition range for ground pavement surveying in the collected ground environmental information;
A radiographic image capturing unit for capturing an exploration area with an infrared radiographic camera at a time of exploration based on the extracted information to be surveyed; And
And a ground pupil detection unit for obtaining the ground pupil information through the photographed infrared image. The method according to claim 1,
The ground environment information collecting unit,
Wherein the geo-environmental information of a region of interest is collected in real time or periodically from a database of an external organization using wired or wireless communication. The method according to claim 1,
The geotechnical environment information includes:
Wherein the geographical information includes at least one of solar radiation information, geothermal information, soil information, and concrete information of a region of interest. The method of claim 2,
The soil information and the concrete information are,
Density, specific heat, and conductivity information of the ground por- tion detection system using the infrared thermal imaging camera. The method of claim 3,
The range of the ground porthole survey environmental condition is,
Wherein a solar radiation value absorbed by the ground surface of the area is not less than 2 W / m < 2 >. The method of claim 3,
The range of the ground porthole survey environmental condition is,
Wherein the ground temperature of the region is 10 ° C or more. Claim 1:
The ground pore detection unit detects,
Wherein the photographed infrared image is displayed as a three-dimensional simulation image including the ground porphyography information. (a) collecting geo-environmental information including at least one of solar radiation information, geothermal information, soil information, and concrete information of a geographical environment information collecting unit;
(b) extracting exploration target information including the exploration area and the exploration time information within the predetermined ground pavement exploration environmental condition range for the ground pavement exploration in the collected ground environment information collected by the exploration object extracting part;
(c) photographing the exploration area with an infrared camera at a time of exploration based on the extracted information to be surveyed; And
(d) obtaining a ground pupil information through a photographed infrared image of the ground pupil detection unit. The method of claim 8,
The step (a)
Wherein the ground environment information collection unit collects the ground environment information of the area of interest from a database of an external organization in real time or periodically using wired or wireless communication. The method of claim 8,
In the step (b)
The range of the ground porthole survey environmental condition is,
Wherein the solar radiation absorbed by the ground surface of the area is not less than 2 W / m < 2 >. The method of claim 8,
The range of the ground porthole survey environmental condition is,
Wherein the ground temperature of the region is 10 ° C or higher. The method of claim 8,
The step (d)
And converting the photographed infrared image into a three-dimensional simulation image including the ground porphyography information, and displaying the transformed three-dimensional simulation image using the infrared pyramid camera. A computer program stored in a computer-readable medium for executing a method of detecting ground pockets using the infrared radiographic camera of claim 8 in combination with hardware.

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